ci: isolate Wellman from runner site-packages [ticket-019]

[tom-sapletta-com]

The metadata workflow currently permits runner-installed packages to mask undeclared Wellman dependencies. Invoke its existing pinned-source checker with Python -S while preserving all source/action pins and existing gates.

Validation: the pinned-source checker passed locally with site-packages disabled; the managed gate passed for the committed base/head comparison. Hosted CI and independent Validator approval are required before merge.

[ifuri-validator-agent]

Validator approval after policy checks for exact head 56d9c356a941dfa8109d4b8ad455cbfe71ea28a9.

Ticket: ticket-019
Correlation ID: local-autogrammar-testql-pr-35-ticket-019
Model: openai/cursor-auto
Reviewed diff chunks: 1
Advisory LLM verdict: APPROVE
Advisory summary: Reviewed all 1 diff chunk(s). The workflow change correctly invokes the existing checker with Python -S while preserving PYTHONPATH and the pinned-source validation design. The ticket metadata matches the narrowly scoped CI hardening change, and all reported checks pass, including the sole protected required check.
Advisory findings: none
The LLM output above is advisory and was not used as the approval trust root.
Semantic review prerequisite: satisfied; policy 676cb4516bbfed2a000e40b9b1b6e4a430ecc761ec546aeb53d721a1905cfdd7.

Actual PR impact radar

Exact range: 5263963a8de57388ed2e65c48a22c5e58d958130...56d9c356a941dfa8109d4b8ad455cbfe71ea28a9
Change digest: 1eb0f95ad7537d52f6716880c578c1eab7301bbcc92f6d9bbe34bb4a30d3d75e
Score: 52/100 (L), estimated 62 min, split recommended: true
Affected services/components: repository-wide/unclassified

Machine-readable radar JSONL and SVG

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Merge will be attempted after this approval when explicitly authorized. ## Decision record (recomputable)

DECISION D-019-6374
TICKET ticket-019
HEAD_SHA 56d9c356a941dfa8109d4b8ad455cbfe71ea28a9
CORRELATION_ID local-autogrammar-testql-pr-35-ticket-019
ACTOR agent:ifuri-validator-agent[bot]
APPLIED_RULE P-CORE-015
INPUT author_login = "tom-sapletta-com"
INPUT observed_checks = ["test=PASS","governance / enforce=PASS","governance / remote lifecycle=PASS","metadata=PASS"]
INPUT required_checks = ["test"]
INPUT required_checks_source = "protected registry (env/request)"
INPUT reviewer_login = "ifuri-validator-agent[bot]"
INPUT semantic_review_assessment = {"schema":"subactor.validator/semantic-review-assessment/v1","subject":{"repository":"autogrammar/testql","pull_request":35,"head_sha":"56d9c356a941dfa8109d4b8ad455cbfe71ea28a9","base_sha":"5263963a8de57388ed2e65c48a22c5e58d958130","diff_sha256":"cc6de9cd91bb2baef647748ae75aa17b7b6bc3784d3efa225eabd890e024b661"},"policy":{"policy_schema":"subactor.validator/semantic-review-policy/v1","policy_version":1,"policy_sha256":"676cb4516bbfed2a000e40b9b1b6e4a430ecc761ec546aeb53d721a1905cfdd7","required":true,"critical_paths":[".github/workflows/wellman.yml"],"observed_paths":[".github/workflows/wellman.yml","project/TICKETS.md","project/ticket-019/README.md","project/ticket-019/intent.json"]},"grounding":"full-diff-not-per-finding-proof","execution_authority":false,"status":"satisfied","reason":null,"review_sha256":"e8a6de8409e1e1d1c2e8ea32f544a7e751ce997f0230db95bbb95b20439d9e98","unresolved":[]}
INPUT superseded_checks = []
INPUT ticket_radar_receipt = {"schema":"subactor.ticket-radar/v1","base_sha":"5263963a8de57388ed2e65c48a22c5e58d958130","head_sha":"56d9c356a941dfa8109d4b8ad455cbfe71ea28a9","change_digest":"1eb0f95ad7537d52f6716880c578c1eab7301bbcc92f6d9bbe34bb4a30d3d75e","score":52,"complexity":"L","estimated_minutes":62,"split_recommended":true,"services":[],"authority":"ADVISORY","promotion":"FORBIDDEN"}
VERDICT APPROVE AUTHORITY DETERMINISTIC
REJECTED REQUEST_CHANGES BECAUSE NO_UNSAFE_CHANGE_REASON_FOUND
ADVISORY llm_verdict = "APPROVE" MODEL "openai/cursor-auto"
ASSERT VERDICT_AUTHORITY != "ADVISORY"