feat(storage): implement storage manager for centralized management and cleanup

- Added a new Storage Manager component to handle storage statistics, project cleanup, and configuration for CCW centralized storage.
- Introduced functions to calculate directory sizes, get project storage stats, and clean specific or all storage.
- Enhanced SQLiteStore with a public API for executing queries securely.
- Updated tests to utilize the new execute_query method and validate storage management functionalities.
- Improved performance by implementing connection pooling with idle timeout management in SQLiteStore.
- Added new fields (token_count, symbol_type) to the symbols table and adjusted related insertions.
- Enhanced error handling and logging for storage operations.

codex-lens/tests/test_entities.py

@@ -199,7 +199,13 @@ class TestEntitySerialization:
         """Test Symbol serialization."""
         symbol = Symbol(name="test", kind="function", range=(1, 10))
         data = symbol.model_dump()
-        assert data == {"name": "test", "kind": "function", "range": (1, 10)}
+        assert data == {
+            "name": "test",
+            "kind": "function",
+            "range": (1, 10),
+            "token_count": None,
+            "symbol_type": None,
+        }
 
     def test_indexed_file_model_dump(self):
         """Test IndexedFile serialization."""