Add AuditMiddleware for request logging and Redis‐based rate limiting

[Coolgiserz]

Add AuditMiddleware for request logging and Redis‐based rate limiting

1. Introduce AuditMiddleware to capture and log each request’s RPC method, parameters, client IP, HTTP status code, and processing time
2. Implement RedisRateLimitMiddleware to enforce IP-based throttling with configurable max requests per time window, returning 429 on limit breach
3. Register both middlewares in the HTTP app setup to apply auditing and rate limiting across all endpoints