Add mdformat pre-commit hook

todo.md

@@ -3,6 +3,7 @@
 ## 📋 Planned Tasks
 
 ### Core Database Features
+
 - [ ] Design commit pipeline architecture with three-stage processing
   - [ ] Stage 1: Version assignment and precondition validation thread
   - [ ] Stage 2: Transaction persistence and subscriber streaming thread
@@ -13,6 +14,7 @@
 - [ ] Design and architect the subscription component for change streams
 
 ### API Endpoints Implementation
+
 - [ ] Implement `GET /v1/version` endpoint to return latest committed version and leader
 - [ ] Implement `POST /v1/commit` endpoint for transaction submission with precondition validation
 - [ ] Implement `GET /v1/status` endpoint for commit request status lookup by request_id
@@ -23,6 +25,7 @@
 - [ ] Implement `DELETE /v1/retention/<policy_id>` endpoint for retention policy removal
 
 ### Infrastructure & Tooling
+
 - [x] Implement thread-safe Prometheus metrics library and serve `GET /metrics` endpoint
 - [ ] Implement gperf-based HTTP routing for efficient request dispatching
 - [ ] Replace nlohmann/json with simdjson DOM API in parser comparison benchmarks
@@ -54,6 +57,7 @@
   - [ ] Implement `DeleteObjects` for batch object deletion
 
 ### Client Libraries
+
 - [ ] Implement high-level Python client library for WeaselDB REST API
   - [ ] Wrap `/v1/version`, `/v1/commit`, `/v1/status` endpoints
   - [ ] Handle `/v1/subscribe` SSE streaming with reconnection logic
@@ -64,6 +68,7 @@
   - [ ] Provide CLI tooling for database administration
 
 ### Testing & Validation
+
 - [ ] Build out-of-process API test suite using client library over real TCP
   - [ ] Test all `/v1/version`, `/v1/commit`, `/v1/status` endpoints
   - [ ] Test `/v1/subscribe` Server-Sent Events streaming