Stop OpenCode bridge waiting after requested changes

[seonghobae]

Summary

• end the pull_request OpenCode bridge immediately when the trusted same-head review requests changes
• keep successful bridge behavior for trusted approvals

Validation

• bash -n scripts/ci/collect_failed_check_evidence.sh
• bash -n scripts/ci/opencode_review_approve_gate.sh
• bash -n scripts/ci/validate_opencode_failed_check_review.sh
• python3 -m py_compile scripts/ci/opencode_review_normalize_output.py
• actionlint -shellcheck= -pyflakes= .github/workflows/opencode-review.yml .github/workflows/pr-review-merge-scheduler.yml
• git diff --check