test: add comprehensive edge-case unit tests for jira-utils

[bhavyanjain3004]

Description

fixes #1726
This PR adds comprehensive edge-case unit test coverage for the jira-utils module to verify Jira integration utilities.

Changes

• Added tests to check case-sensitivity and whitespace handling for statusCategory in categorizeStatus().
• Added tests for calculateMetrics() to verify zero-duration intervals (where resolved and created times are equal), negative durations (resolved before created), and invalid date strings (which produce NaN).

[vercel]

@bhavyanjain3004 is attempting to deploy a commit to the PRIYANSHU DOSHI's projects Team on Vercel.

A member of the Team first needs to authorize it.

[github-actions]

GSSoC Label Checklist 🏷️

@Priyanshu-byte-coder — please apply the appropriate labels before merging:

Difficulty (pick one):

• level:beginner — 20 pts
• level:intermediate — 35 pts
• level:advanced — 55 pts
• level:critical — 80 pts

Quality (optional):

• quality:clean — ×1.2 multiplier
• quality:exceptional — ×1.5 multiplier

Validation (required to score):

• gssoc:approved — counts for points
• gssoc:invalid / gssoc:spam / gssoc:ai-slop — does not score

Type labels (type:*) are auto-detected from files and title. Review and adjust if needed.
Points formula: (difficulty × quality_multiplier) + type_bonus

[github-actions]

🎉 Merged! Thanks for contributing to DevTrack.

If the project has been useful to you, a ⭐ star on the repo is the easiest way to support it — it helps DevTrack get discovered by more developers.

Keep an eye on open issues for your next contribution!