feat: Implement audit logging and rate limiting middleware with SurrealDB integration

- Added audit logging middleware to track admin actions and save logs to SurrealDB.
- Introduced rate limiting middleware for public endpoints and authentication endpoints.
- Enhanced security headers middleware with nonce generation for CSP in development.
- Created utility functions for extracting real client IP addresses from headers.
- Updated Cargo.toml and Cargo.lock to include new dependencies.
- Added new schemas for audit logs and rate limiting in the entities module.
- Refactored permissions middleware to support new permission checks.

imphnen-middleware/src/lib.rs

@@ -6,6 +6,7 @@ pub mod security_headers_middleware;
 
 pub use auth_middleware::auth_middleware;
 pub use cors_middleware::cors_middleware;
-pub use permissions_middleware::PermissionsMiddlewareLayer;
-pub use rate_limiting_middleware::auth_rate_limiting_middleware;
+pub use permissions_middleware::{PermissionsMiddlewareLayer, check_permissions};
+// pub use audit_logging_middleware::{audit_logging_middleware, detailed_audit_logging_middleware};
+pub use rate_limiting_middleware::{auth_rate_limiting_middleware, rate_limiting_middleware};
 pub use security_headers_middleware::security_headers_middleware;