chore: Add error logs for consolidated API (#35779)

## Description
PR to add error logs in the consolidated-api as whenever DB operation
fails we are not logging these anywhere and ends up in the response
only.

/test Sanity

## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [x] No


<!-- This is an auto-generated comment: Cypress test results  -->
> [!IMPORTANT]
> 🟣 🟣 🟣 Your tests are running.
> Tests running at:
<https://github.com/appsmithorg/appsmith/actions/runs/10466559600>
> Commit: c04482ee779580e789f138ab510c1dc5444e617c
> Workflow: `PR Automation test suite`
> Tags: `@tag.Sanity`
> Spec: ``
> <hr>Tue, 20 Aug 2024 06:37:40 UTC
<!-- end of auto-generated comment: Cypress test results  -->


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Bug Fixes**
- Enhanced error logging for asynchronous operations, improving
diagnostics for failures in data fetching related to user profiles,
feature flags, and more.
- **Improvements**
- Augmented observability and robustness of the application through
detailed error messages for data retrieval issues.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

app/server/appsmith-server/src/main/java/com/appsmith/server/services/ce/ConsolidatedAPIServiceCEImpl.java

@@ -154,6 +154,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                 .getCurrentUser()
                 .flatMap(userService::buildUserProfileDTO)
                 .as(this::toResponseDTO)
+                .doOnError(e -> log.error("Error fetching user profile", e))
                 .doOnSuccess(consolidatedAPIResponseDTO::setUserProfile)
                 .name(getQualifiedSpanName(USER_PROFILE_SPAN, mode))
                 .tap(Micrometer.observation(observationRegistry)));
@@ -162,6 +163,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
         Mono<ResponseDTO<Map<String, Boolean>>> featureFlagsForCurrentUserResponseDTOMonoCache = userDataService
                 .getFeatureFlagsForCurrentUser()
                 .as(this::toResponseDTO)
+                .doOnError(e -> log.error("Error fetching feature flags", e))
                 .doOnSuccess(consolidatedAPIResponseDTO::setFeatureFlags)
                 .name(getQualifiedSpanName(FEATURE_FLAG_SPAN, mode))
                 .tap(Micrometer.observation(observationRegistry))
@@ -172,6 +174,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
         fetches.add(tenantService
                 .getTenantConfiguration()
                 .as(this::toResponseDTO)
+                .doOnError(e -> log.error("Error fetching tenant config", e))
                 .doOnSuccess(consolidatedAPIResponseDTO::setTenantConfig)
                 .name(getQualifiedSpanName(TENANT_SPAN, mode))
                 .tap(Micrometer.observation(observationRegistry)));
@@ -230,6 +233,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                 })
                 .as(this::toResponseDTO)
                 .doOnSuccess(consolidatedAPIResponseDTO::setPages)
+                .doOnError(e -> log.error("Error fetching application pages", e))
                 .name(getQualifiedSpanName(PAGES_SPAN, mode))
                 .tap(Micrometer.observation(observationRegistry))
                 .cache();
@@ -240,6 +244,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
         fetches.add(branchedApplicationMonoCached
                 .flatMap(branchedApplication -> themeService.getApplicationTheme(branchedApplication.getId(), mode))
                 .as(this::toResponseDTO)
+                .doOnError(e -> log.error("Error fetching current theme", e))
                 .doOnSuccess(consolidatedAPIResponseDTO::setCurrentTheme)
                 .name(getQualifiedSpanName(CURRENT_THEME_SPAN, mode))
                 .tap(Micrometer.observation(observationRegistry)));
@@ -250,6 +255,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                         .getApplicationThemes(branchedApplication.getId())
                         .collectList())
                 .as(this::toResponseDTO)
+                .doOnError(e -> log.error("Error fetching themes", e))
                 .doOnSuccess(consolidatedAPIResponseDTO::setThemes)
                 .name(getQualifiedSpanName(THEMES_SPAN, mode))
                 .tap(Micrometer.observation(observationRegistry)));
@@ -259,6 +265,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                 .flatMap(branchedApplication -> customJSLibService.getAllJSLibsInContext(
                         branchedApplication.getId(), CreatorContextType.APPLICATION, isViewMode))
                 .as(this::toResponseDTO)
+                .doOnError(e -> log.error("Error fetching custom JS libraries", e))
                 .doOnSuccess(consolidatedAPIResponseDTO::setCustomJSLibraries)
                 .name(getQualifiedSpanName(CUSTOM_JS_LIB_SPAN, mode))
                 .tap(Micrometer.observation(observationRegistry)));
@@ -268,6 +275,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
             fetches.add(applicationPageService
                     .getPageAndMigrateDslByBranchAndBasePageId(basePageId, branchName, isViewMode, true)
                     .as(this::toResponseDTO)
+                    .doOnError(e -> log.error("Error fetching current page", e))
                     .doOnSuccess(consolidatedAPIResponseDTO::setPageWithMigratedDsl)
                     .name(getQualifiedSpanName(CURRENT_PAGE_SPAN, mode))
                     .tap(Micrometer.observation(observationRegistry)));
@@ -283,6 +291,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                             .getActionsForViewMode(branchedApplication.getId())
                             .collectList())
                     .as(this::toResponseDTO)
+                    .doOnError(e -> log.error("Error fetching actions for view mode", e))
                     .doOnSuccess(consolidatedAPIResponseDTO::setPublishedActions)
                     .name(getQualifiedSpanName(ACTIONS_SPAN, mode))
                     .tap(Micrometer.observation(observationRegistry)));
@@ -293,6 +302,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                             .getActionCollectionsForViewMode(branchedApplication.getId())
                             .collectList())
                     .as(this::toResponseDTO)
+                    .doOnError(e -> log.error("Error fetching action collections for view mode", e))
                     .doOnSuccess(consolidatedAPIResponseDTO::setPublishedActionCollections)
                     .name(getQualifiedSpanName(ACTION_COLLECTIONS_SPAN, mode)));
 
@@ -307,6 +317,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                                 .collectList();
                     })
                     .as(this::toResponseDTO)
+                    .doOnError(e -> log.error("Error fetching unpublished actions", e))
                     .doOnSuccess(consolidatedAPIResponseDTO::setUnpublishedActions)
                     .name(getQualifiedSpanName(ACTIONS_SPAN, mode))
                     .tap(Micrometer.observation(observationRegistry)));
@@ -320,6 +331,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                     })
                     .collectList()
                     .as(this::toResponseDTO)
+                    .doOnError(e -> log.error("Error fetching unpublished action collections", e))
                     .doOnSuccess(consolidatedAPIResponseDTO::setUnpublishedActionCollections)
                     .name(getQualifiedSpanName(ACTION_COLLECTIONS_SPAN, mode))
                     .tap(Micrometer.observation(observationRegistry)));
@@ -330,6 +342,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                     .flatMap(page -> applicationPageService.getPageDTOAfterMigratingDSL(page, false, true))
                     .collect(Collectors.toList())
                     .as(this::toResponseDTO)
+                    .doOnError(e -> log.error("Error fetching pages with migrated DSL", e))
                     .doOnSuccess(consolidatedAPIResponseDTO::setPagesWithMigratedDsl)
                     .name(getQualifiedSpanName(PAGES_DSL_SPAN, mode))
                     .tap(Micrometer.observation(observationRegistry)));
@@ -355,6 +368,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                             ? Mono.empty()
                             : pluginService.getInWorkspace(workspaceId).collectList())
                     .as(this::toResponseDTO)
+                    .doOnError(e -> log.error("Error fetching plugins", e))
                     .doOnSuccess(consolidatedAPIResponseDTO::setPlugins)
                     .name(getQualifiedSpanName(PLUGINS_SPAN, mode))
                     .tap(Micrometer.observation(observationRegistry))
@@ -371,6 +385,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                         return datasourceService.getAllWithStorages(params).collectList();
                     })
                     .as(this::toResponseDTO)
+                    .doOnError(e -> log.error("Error fetching datasources", e))
                     .doOnSuccess(consolidatedAPIResponseDTO::setDatasources)
                     .name(getQualifiedSpanName(DATASOURCES_SPAN, mode))
                     .tap(Micrometer.observation(observationRegistry))
@@ -415,6 +430,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                         return pluginIdToFormConfigMap;
                     })
                     .as(this::toResponseDTO)
+                    .doOnError(e -> log.error("Error fetching plugin form configs", e))
                     .doOnSuccess(consolidatedAPIResponseDTO::setPluginFormConfigs)
                     .name(getQualifiedSpanName(FORM_CONFIG_SPAN, mode))
                     .tap(Micrometer.observation(observationRegistry)));
@@ -424,6 +440,7 @@ public class ConsolidatedAPIServiceCEImpl implements ConsolidatedAPIServiceCE {
                     .getMockDataSet()
                     .map(MockDataDTO::getMockdbs)
                     .as(this::toResponseDTO)
+                    .doOnError(e -> log.error("Error fetching mock datasources", e))
                     .doOnSuccess(consolidatedAPIResponseDTO::setMockDatasources)
                     .name(getQualifiedSpanName(MOCK_DATASOURCES_SPAN, mode))
                     .tap(Micrometer.observation(observationRegistry)));