… and async store handling

Implement bufferedEventCommit that batches event writes, guarded by a file lock to prevent race conditions.
Store operations now return Promises, enabling non-blocking dev-server startup and hot-reload scenarios.

- Add file-based locking mechanism to prevent concurrent write conflicts
- Implement event batching to improve performance during high-frequency updates
- Convert store operations to async/await pattern for better dev-server integration
- Enable hot-reload functionality without blocking the development workflow

… dev cli in the future