made querying async

app/services/querying.py

@@ -1,3 +1,4 @@
+import asyncio
 import hashlib
 import logging
 import os
@@ -126,14 +127,19 @@ Return ONLY the SQL query, no explanations or markdown.""",
         """Generate cache key from normalized question."""
         return hashlib.md5(question.lower().strip().encode()).hexdigest()
 
-    def process_query(
+    async def process_query(
         self, question: str, project_id: Optional[int] = None
     ) -> PaginatedResponse[InvestmentResponse]:
-        """Process a query by generating and executing SQL directly.
+        """Async wrapper for process_query. Runs blocking work in a thread to avoid
+        blocking the event loop.
+        """
+        return await asyncio.to_thread(self._process_query_sync, question, project_id)
 
-        Args:
-            question: The natural language query to process
-            project_id: Optional project ID for compatibility scoring
+    def _process_query_sync(
+        self, question: str, project_id: Optional[int] = None
+    ) -> PaginatedResponse[InvestmentResponse]:
+        """Synchronous implementation of process_query. This is run in a thread by
+        the async wrapper above.
         """
         cache_key = self._get_cache_key(question)