Step 4: Validation & HTTP Status Codes

4. Validation & HTTP Status Codes

Enforce strict payload validations and correct HTTP response statuses.

Detailed Implementation Steps:

Add validation middleware checking inputs: task title must be a string. Return 400 Bad Request on validation failures.

Return 201 Created on insertions. Return 404 Not Found when task IDs are missing.

Verification Checklist:

1. Verify response headers and status codes using API client utilities.