Re-test a bug fix after a developer resolves it. Pulls the original bug from Jira,
re-executes the repro steps in the browser, checks for regressions, and updates
the bug status. The final step in the SDT workflow before a ticket moves to Done.
Use when: "verify fix", "retest", "is this fixed?", "check BUG-123", "verify BUG-123".
Do NOT use when: running initial QA (use /qa-qa), filing new bugs, testing a feature for the first time.
