[ENHANCEMENT] Add request ID middleware for improved request tracing

[Lochit-Vinay]

Summary

This PR introduces request ID tracking using middleware to improve debugging and traceability across API requests.

Changes Made

• Added RequestIDMiddleware using BaseHTTPMiddleware
• Generates a unique UUID for each incoming request
• Attaches request_id to request.state
• Includes request ID in response headers (X-Request-ID)

Example

Response headers:
X-Request-ID: 123e4567-e89b-12d3-a456-426614174000

Why this is useful

• Helps trace requests across logs and services
• Improves debugging in concurrent environments
• Useful for observability and monitoring

Note

I didn’t find any existing issue related to request-level tracing.

Closes #395

[Lochit-Vinay]

Resolved merge conflict by merging request ID middleware with existing CORS configuration from main branch, ensuring both features work together without duplication.

[Lochit-Vinay]

Resolved merge conflicts by integrating request ID middleware with existing CORS and exception handling setup, ensuring no duplication and preserving all functionalities.