feat(server): improve indexer perf (#15512)

#### PR Dependency Tree


* **PR #15512** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

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

## Summary by CodeRabbit

* **New Features**
* Search now supports generation-based indexing with embedded and remote
providers.
* Added automatic search reconciliation and improved handling of
document, workspace, and permission changes.
* Added clearer search status errors for unavailable, syncing, unready,
or failed indexes.
* Added Manticore Search end-to-end support and provider-specific search
behavior.

* **Improvements**
* Search and aggregate pagination now report returned results and
continuation status more accurately.
* Improved permission filtering to prevent inaccessible documents from
appearing in results.
  * Admin provider selection now consistently enables indexing.

* **Documentation**
* Clarified search pagination, aggregation counts, provider
configuration, and end-to-end setup.

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

.devcontainer/docker-compose.yml

@@ -12,7 +12,6 @@ services:
     environment:
       DATABASE_URL: postgresql://affine:affine@db:5432/affine
       REDIS_SERVER_HOST: redis
-      AFFINE_INDEXER_SEARCH_ENDPOINT: http://indexer:9308
 
   db:
     image: pgvector/pgvector:pg16
@@ -26,19 +25,5 @@ services:
   redis:
     image: redis
 
-  indexer:
-    image: manticoresearch/manticore:${MANTICORE_VERSION:-10.1.0}
-    ulimits:
-      nproc: 65535
-      nofile:
-        soft: 65535
-        hard: 65535
-      memlock:
-        soft: -1
-        hard: -1
-    volumes:
-      - manticoresearch_data:/var/lib/manticore
-
 volumes:
   postgres-data:
-  manticoresearch_data: