fix: resolve ruff lint errors (I001 import sorting in store_sqlite) — Conrad CJ Wilson

Author: Conrad CJ Wilson

backend/ragpilot/store_sqlite.py

@@ -5,14 +5,14 @@
 - cosine similarity retrieval w/ metadata filtering
 - entity + edge tables for relationship mapping (knowledge graph)
 """
+import json
 import os
 import sqlite3
-import threading
-import json
 import struct
+import threading
 
 from ragpilot.config import DB_PATH
-from ragpilot.models import Document, Chunk
+from ragpilot.models import Chunk, Document
 
 os.makedirs(os.path.dirname(DB_PATH), exist_ok=True)
 _lock = threading.Lock()