fix(jira): handle JIRA Cloud API v3 pagination format

[sfvishalgupta]

Summary

This PR fixes the issue where JIRA search results showed '0 total issues' despite finding issues.

Root Cause

JIRA Cloud API v3 changed their pagination format:

• Old format: total, maxResults, startAt
• New format: nextPageToken, isLast (no total field)

Changes

• Updated JiraService.searchIssues() to detect and handle both pagination formats
• Calculate total from isLast flag when using new format
• Maintain backward compatibility with old format
• Ensure proper fallback values for maxResults

Testing

✅ Tested with JIRA Cloud API - correctly shows issue counts
✅ Backward compatible with old API format

Impact

• Fixes #N/A
• Affects: All JIRA search operations in the quality analyzer

🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com