FIX: Add missing search_documents method to LanceDBService - resolves enhanced search errors

lancedb_service.py

@@ -409,6 +409,37 @@ class LanceDBService:
             logger.error(f"❌ Error deleting document: {e}")
             return False
 
+    async def search_documents(self, query: str, limit: int = 5, knowledge_base: str = None):
+        """Search for documents with specific query and limit"""
+        try:
+            query_embedding = self.embedding_model.embed_query(query)
+            
+            tbl = self.db.open_table("documents")
+            
+            # Build search query
+            search_query = tbl.search(query_embedding).limit(limit)
+            
+            # Add knowledge base filter if specified
+            if knowledge_base:
+                search_query = search_query.where(f"knowledge_base = '{knowledge_base}'")
+            
+            results = search_query.to_list()
+
+            docs = []
+            for result in results:
+                docs.append({
+                    'content': result['content'],
+                    'metadata': json.loads(result['metadata']) if result['metadata'] else {},
+                    'score': result.get('_distance', 0.0),
+                    'knowledge_base': result.get('knowledge_base', 'unknown')
+                })
+
+            return docs
+
+        except Exception as e:
+            logger.error(f"❌ Error searching documents: {e}")
+            return []
+
     async def search_all_knowledge_bases(self, query: str, k: int = 4):
         """Search across all knowledge bases"""
         try: