Fix CI test import path resolution

Add a tests conftest bootstrap to include the project root in sys.path so pytest can import api and models modules reliably in GitHub Actions.

Author: adit24dhaya

tests/conftest.py

@@ -0,0 +1,7 @@
+import sys
+from pathlib import Path
+
+
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+if str(PROJECT_ROOT) not in sys.path:
+    sys.path.insert(0, str(PROJECT_ROOT))