release: bump version to 0.3.0

- Refactor Redis backend connection handling and pool management
- Update algorithm implementations with improved type annotations
- Enhance config loader validation with stricter Pydantic schemas
- Improve decorator and middleware error handling
- Expand example scripts with better docstrings and usage patterns
- Add new 00_basic_usage.py example for quick start
- Reorganize examples directory structure
- Fix type annotation inconsistencies across core modules
- Update dependencies in pyproject.toml

README.md

@@ -188,16 +188,19 @@ async def rate_limit_handler(request: Request, exc: RateLimitExceeded):
 ## Backends
 
 ### MemoryBackend (Default)
+
 - In-memory storage with LRU eviction
 - Best for single-process applications
 - No persistence across restarts
 
 ### SQLiteBackend
+
 - Persistent storage using SQLite
 - WAL mode for better performance
 - Suitable for single-node deployments
 
 ### RedisBackend
+
 - Distributed storage using Redis
 - Required for multi-node deployments
 - Supports atomic operations via Lua scripts