fix(ci): fail closed and identify executed quality gates

[tom-sapletta-com]

Ticket: ticket-093
Correlation ID: koru-ticket-093-quality-gates

Koru could report overall success when a selected quality tool was missing, could not start, or was unknown. These cases now fail verification and honor fail_fast. Executed gate results include argv so the absolute regix gates check can be distinguished from regix compare HEAD --local; quality thresholds remain unchanged.

Validation: 7 regression failures reproduced before the fix; 25 focused tests pass (16 deselected by repository configuration), Ruff, managed governance and Docker Compose pass. A real c2004 MCP handler invocation still correctly reports its existing absolute Regix failures and now identifies the command.

[ifuri-validator-agent]

Deterministic Validator approval for exact head 250167642f96ad09965f95899dde7842e0585b59.

Ticket: ticket-093
Correlation ID: koru-pr-129-ticket-093
Model: zai/glm-5.3
Reviewed diff chunks: 1
Advisory LLM verdict: APPROVE
Advisory summary: Reviewed all 1 diff chunk(s). Bounded fix in src/koru/ci/gates.py makes unknown gates fail overall (previously skipped), honors fail_fast for them, attaches executed argv to gate result payloads, and changes aggregate failure condition from a status set to status != 'passed', so missing tools and execution errors fail closed. New regression tests cover missing, permission-denied, non-zero exit, and unknown gates in both fail_fast modes, plus argv exposure and unchanged absolute regix command. Regix policy is preserved. All listed checks pass.
Advisory findings: none
The LLM output above is advisory and was not used as the approval trust root.

Actual PR impact radar

Exact range: e89d82279735a5b872cd8bdd76e39385abfbcf45...250167642f96ad09965f95899dde7842e0585b59
Change digest: be71476017025a807e1797491efdd8f1015e96bc0b17dcda17f80e9cb2e46b94
Score: 48/100 (M), estimated 56 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-093-8997
TICKET ticket-093
HEAD_SHA 250167642f96ad09965f95899dde7842e0585b59
CORRELATION_ID koru-pr-129-ticket-093
ACTOR agent:ifuri-validator-agent[bot]
APPLIED_RULE P-CORE-015
INPUT author_login = "tom-sapletta-com"
INPUT observed_checks = ["governance / remote lifecycle=PASS","standard packs / conformance=PASS","governance / enforce=PASS","onedev/local-verify=PASS"]
INPUT required_checks = ["onedev/local-verify","standard packs / conformance"]
INPUT required_checks_source = "protected registry + GitHub applied rules (env/request)"
INPUT reviewer_login = "ifuri-validator-agent[bot]"
INPUT superseded_checks = ["smoke"]
INPUT ticket_radar_receipt = {"schema":"subactor.ticket-radar/v1","base_sha":"e89d82279735a5b872cd8bdd76e39385abfbcf45","head_sha":"250167642f96ad09965f95899dde7842e0585b59","change_digest":"be71476017025a807e1797491efdd8f1015e96bc0b17dcda17f80e9cb2e46b94","score":48,"complexity":"M","estimated_minutes":56,"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 "zai/glm-5.3"
ASSERT VERDICT_AUTHORITY != "ADVISORY"