feat: Adding file metadata to hybrid search (#19095)

* Added metadata to hybrid search

* And config and env plus refac

* consistency

---------

Co-authored-by: Tim Baek <tim@openwebui.com>

backend/open_webui/main.py

@@ -337,6 +337,7 @@ from open_webui.config import (
     ENABLE_ONEDRIVE_PERSONAL,
     ENABLE_ONEDRIVE_BUSINESS,
     ENABLE_RAG_HYBRID_SEARCH,
+    ENABLE_RAG_HYBRID_SEARCH_ENRICHED_TEXTS,
     ENABLE_RAG_LOCAL_WEB_FETCH,
     ENABLE_WEB_LOADER_SSL_VERIFICATION,
     ENABLE_GOOGLE_DRIVE_INTEGRATION,
@@ -841,6 +842,9 @@ app.state.config.FILE_IMAGE_COMPRESSION_HEIGHT = FILE_IMAGE_COMPRESSION_HEIGHT
 app.state.config.RAG_FULL_CONTEXT = RAG_FULL_CONTEXT
 app.state.config.BYPASS_EMBEDDING_AND_RETRIEVAL = BYPASS_EMBEDDING_AND_RETRIEVAL
 app.state.config.ENABLE_RAG_HYBRID_SEARCH = ENABLE_RAG_HYBRID_SEARCH
+app.state.config.ENABLE_RAG_HYBRID_SEARCH_ENRICHED_TEXTS = (
+    ENABLE_RAG_HYBRID_SEARCH_ENRICHED_TEXTS
+)
 app.state.config.ENABLE_WEB_LOADER_SSL_VERIFICATION = ENABLE_WEB_LOADER_SSL_VERIFICATION
 
 app.state.config.CONTENT_EXTRACTION_ENGINE = CONTENT_EXTRACTION_ENGINE