Feature — Configurable & Structured Logging

[coderkrp]

As a developer,
I want structured logs with configurable levels,
So that I can debug effectively in production.

Acceptance criteria

• AC1: The logging level (DEBUG, INFO, ERROR) can be configured via an environment variable.
• AC2: All log output is in a structured JSON format.
• AC3: The application correctly uses different log levels for different types of events (e.g., INFO for requests, ERROR for failures).

Definition of Done

• Code implemented in a feature/fix branch
• Unit / integration tests added or existing tests updated
• Linting passed and code builds locally
• Docs / README updated if behavior changed
• PR opened and linked (Closes #<issue-number>)
• Manual QA steps verified (if applicable)