fix(core): Resolve persistence, indexing schema, and RAG collection bugs

- compose: Add persistent logs verification volume
- setup: Add DOCS_PATH configuration
- indexer: Fix missing 'metadata' column schema error during update
- rag: Fix collection name mismatch (trailing underscore)

app/services/document_indexer.py

@@ -174,6 +174,14 @@ class DocumentIndexer:
         # Update post_vectors to mark as document type
         file_hash = self.get_file_hash(file_path)
         with self.db_conn.cursor(DictCursor) as cur:
+            # Add metadata column if it doesn't exist
+            try:
+                cur.execute(
+                    "ALTER TABLE post_vectors ADD COLUMN IF NOT EXISTS metadata JSON NULL"
+                )
+            except Exception:
+                pass  # Column might already exist
+
             cur.execute(
                 """
                 UPDATE post_vectors
@@ -194,14 +202,6 @@ class DocumentIndexer:
                 )
             )
 
-            # Add metadata column if it doesn't exist
-            try:
-                cur.execute(
-                    "ALTER TABLE post_vectors ADD COLUMN IF NOT EXISTS metadata JSON NULL"
-                )
-            except Exception:
-                pass  # Column might already exist
-
             # DSGVO Audit Log
             cur.execute(
                 """

app/utils/rag_chat.py

@@ -33,8 +33,8 @@ class RAGChatService:
 
         # Available document collections
         self.doc_collections = [
-            "docs_crumbforest_",
-            "docs_rz_nullfeld_"
+            "docs_crumbforest",
+            "docs_rz_nullfeld"
         ]
 
     def search_documents(