feat(server): add cloud indexer with Elasticsearch and Manticoresearch providers (#11835)

close CLOUD-137

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

- **New Features**
  - Introduced advanced workspace-scoped search and aggregation capabilities with support for complex queries, highlights, and pagination.
  - Added pluggable search providers: Elasticsearch and Manticoresearch.
  - New GraphQL queries, schema types, and resolver support for search and aggregation.
  - Enhanced configuration options for search providers in self-hosted and cloud deployments.
  - Added Docker Compose services and environment variables for Elasticsearch and Manticoresearch.
  - Integrated indexer service into deployment and CI workflows.

- **Bug Fixes**
  - Improved error handling with new user-friendly error messages for search provider and indexer issues.

- **Documentation**
  - Updated configuration examples and environment variable references for indexer and search providers.

- **Tests**
  - Added extensive end-to-end and provider-specific tests covering indexing, searching, aggregation, deletion, and error cases.
  - Included snapshot tests and test fixtures for search providers.

- **Chores**
  - Updated deployment scripts, Helm charts, and Kubernetes manifests to include indexer-related environment variables and secrets.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.docker/selfhost/compose.yml

@@ -10,6 +10,8 @@ services:
         condition: service_healthy
       postgres:
         condition: service_healthy
+      indexer:
+        condition: service_healthy
       affine_migration:
         condition: service_completed_successfully
     volumes:
@@ -41,6 +43,8 @@ services:
         condition: service_healthy
       redis:
         condition: service_healthy
+      indexer:
+        condition: service_healthy
 
   redis:
     image: redis
@@ -72,3 +76,24 @@ services:
       timeout: 5s
       retries: 5
     restart: unless-stopped
+
+  indexer:
+    image: manticoresearch/manticore:${MANTICORE_VERSION:-9.2.14}
+    container_name: affine_indexer
+    volumes:
+      - ${MANTICORE_DATA_LOCATION}:/var/lib/manticore
+    ulimits:
+      nproc: 65535
+      nofile:
+        soft: 65535
+        hard: 65535
+      memlock:
+        soft: -1
+        hard: -1
+    healthcheck:
+      test:
+        ['CMD', 'wget', '-O-', 'http://127.0.0.1:9308']
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    restart: unless-stopped