fix: AI analysis runs on /approve cancel #1006

Description

The test oracle (AI analysis) is triggered even when the approve label is being removed via /approve cancel. It should only run when approving, not when cancelling.

Root Cause

In issue_comment_handler.py line 358, the check if _command == APPROVE_STR: doesn't account for the remove flag set when the command includes cancel.

Fix

Add and not remove to the condition.

Deliverables

• Fix condition in issue_comment_handler.py
• Add test: test_approve_cancel_does_not_call_test_oracle