fix: Update Jira issue search to use the correct JQL endpoint

[r-pedraza]

Pull Request

📝 Summary

This PR corrects the Jira issue search functionality, which was previously using an incorrect API endpoint. The change updates the service to call the specific /search/jql endpoint via a POST request, ensuring that JQL queries are properly executed against the Jira API.

🔧 Changes Made

• Updated IssueService to target the /search/jql endpoint for issue searches.
• Modified the corresponding tests in test_issue_service.py and test_jira_network.py to align with the new endpoint and request method.
• Changed the request from a GET to a POST with a JSON payload, as required by the /search/jql endpoint.

🧪 Testing

• Unit tests added/updated (poetry run pytest)
• All tests passing (make test)
• Manual testing with titan-dev

Unit tests were updated to verify that make_request is now called with POST and the correct /search/jql endpoint. The tests also assert that the JQL payload is sent in the JSON body of the request.

📊 Logs

• No new log events

✅ Checklist

• Self-review done
• Follows the project's logging rules (no secrets, no content in logs)
• New and existing tests pass
• Documentation updated if needed