Fix: create repo record before files (foreign key constraint)

ingest.py

@@ -97,6 +97,9 @@ def run():
     print("\n[5/6] Loading into database...")
     db = GraphDB()
 
+    # Create repo first (empty doc — will be filled in step 6)
+    db.create_repo(name=repo_name, url=TARGET_REPO, language="go", documentation="(generating...)")
+
     for rel_path, content in go_files.items():
         info = parsed[rel_path]
         doc = file_doc_map.get(rel_path, "")