[loop-cycle-50] refactor: replace bare sqlite3.connect() with context managers batch 2 (#157) (#180)

tests/infrastructure/test_model_registry.py

@@ -216,21 +216,15 @@ class TestWALMode:
         with patch("infrastructure.models.registry.DB_PATH", db):
             from infrastructure.models.registry import _get_conn
 
-            conn = _get_conn()
-            try:
+            with _get_conn() as conn:
                 mode = conn.execute("PRAGMA journal_mode").fetchone()[0]
                 assert mode == "wal"
-            finally:
-                conn.close()
 
     def test_registry_db_busy_timeout(self, tmp_path):
         db = tmp_path / "wal_test.db"
         with patch("infrastructure.models.registry.DB_PATH", db):
             from infrastructure.models.registry import _get_conn
 
-            conn = _get_conn()
-            try:
+            with _get_conn() as conn:
                 timeout = conn.execute("PRAGMA busy_timeout").fetchone()[0]
                 assert timeout == 5000
-            finally:
-                conn.close()