fix(sync): address generated review findings

[stranske]

Summary

• enforce the locked PyYAML runtime dependency even when a different version is already installed
• ignore blank provider text blocks so verifier parsing preserves the JSON fallback
• add regression coverage for missing, mismatched, exact, and blank-text cases

Source disposition

This is the source-first follow-up for the active review threads on stranske/Manager-Database#1516. The consumer branch should be replaced after this merges.

Validation

• /opt/anaconda3/bin/python3.12 -m pytest -q tests/scripts/test_check_deliberate_break.py tests/scripts/test_pr_verifier_structured_output.py tests/tools/test_evaluate_model_benchmark.py (62 passed)
• /opt/anaconda3/bin/python3.12 -m ruff check scripts/check_deliberate_break.py scripts/langchain/pr_verifier.py tests/scripts/test_check_deliberate_break.py tests/scripts/test_pr_verifier_structured_output.py
• python3 scripts/validate_template_completeness.py
• git diff --check

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Review details

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: 2b967173-8358-45ae-921f-3a9a187ccad1

📥 Commits

Reviewing files that changed from the base of the PR and between e92136d and 76c9383.

📒 Files selected for processing (6)

• scripts/check_deliberate_break.py
• scripts/langchain/pr_verifier.py
• tests/scripts/test_check_deliberate_break.py
• tests/scripts/test_pr_verifier_structured_output.py
• tests/tools/test_evaluate_model_benchmark.py
• tools/evaluate_model_benchmark.py

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[stranske-keepalive]

Automated Status Summary

Head SHA: 1418624
Latest Runs: ⏳ pending — Gate
Required contexts: summary
Required: core tests (3.12): ⏳ pending, core tests (3.13): ⏳ pending, docker smoke: ⏳ pending, gate: ⏳ pending

Workflow / Job	Result	Logs
(no jobs reported)	⏳ pending	—

Coverage Overview

• Coverage history entries: 1

Coverage Trend

Metric	Value
Current	76.08%
Baseline	85.00%
Delta	-8.92%
Minimum	70.00%
Status	✅ Pass

Top Coverage Hotspots (lowest coverage)

File	Coverage	Missing
scripts/issue_dedup_smoke.py	0.0%	4
scripts/runner_lib/__main__.py	0.0%	3
scripts/validate_template_sync.py	0.0%	81
scripts/langchain/topic_splitter.py	19.1%	57
tools/codex_log_analyzer.py	19.6%	140
scripts/repo_review_round2_runner.py	25.1%	344
scripts/prune_agent_stubs.py	39.7%	26
scripts/repo_review_round1_runner.py	40.7%	133
tools/ensure_workflow_timeout_variables.py	42.1%	74
scripts/sync_label_docs.py	42.9%	64
tools/discover_model_catalog.py	44.8%	55
scripts/repo_review_backlog_scan.py	45.3%	116
scripts/repo_review_body_writer.py	46.5%	86
tools/codex_session_analyzer.py	47.9%	59
scripts/create_verifier_labels.py	48.3%	58

Low Coverage Files (<50.0%)

File	Coverage	Missing
scripts/issue_dedup_smoke.py	0.0%	4
scripts/runner_lib/__main__.py	0.0%	3
scripts/validate_template_sync.py	0.0%	81
scripts/langchain/topic_splitter.py	19.1%	57
tools/codex_log_analyzer.py	19.6%	140
scripts/repo_review_round2_runner.py	25.1%	344
scripts/prune_agent_stubs.py	39.7%	26
scripts/repo_review_round1_runner.py	40.7%	133
tools/ensure_workflow_timeout_variables.py	42.1%	74
scripts/sync_label_docs.py	42.9%	64
tools/discover_model_catalog.py	44.8%	55
scripts/repo_review_backlog_scan.py	45.3%	116
scripts/repo_review_body_writer.py	46.5%	86
tools/codex_session_analyzer.py	47.9%	59
scripts/create_verifier_labels.py	48.3%	58

Updated automatically; will refresh on subsequent CI/Docker completions.

---

Keepalive checklist

Scope

No scope information available

Tasks

• No tasks defined

Acceptance criteria

• No acceptance criteria defined

[chatgpt-codex-connector]

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[Copilot]

Pull request overview

This PR updates Workflows’ PR verifier and deliberate-break gate helper to be more robust in real CI environments: it preserves a JSON fallback when providers emit empty text blocks, and it ensures a pinned PyYAML runtime dependency is enforced even if another version is already installed.

Changes:

• Update verifier response-content extraction to ignore whitespace-only text blocks so fallback JSON serialization is preserved.
• Update deliberate-break runtime dependency handling to pin/upgrade PyYAML based on the installed distribution version (not just import presence).
• Add regression tests covering blank-text verifier content, and PyYAML missing/mismatched/exact-version scenarios.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

File	Description
scripts/langchain/pr_verifier.py	Ignores whitespace-only provider text blocks to preserve JSON fallback for structured parsing/repair.
scripts/check_deliberate_break.py	Enforces a pinned PyYAML version via importlib.metadata and centralizes the pinned version constant.
tests/scripts/test_pr_verifier_structured_output.py	Adds coverage for blank-text-block behavior and JSON fallback preservation.
tests/scripts/test_check_deliberate_break.py	Expands coverage for missing/mismatched/exact PyYAML version handling during runtime dependency installation.