governance: enforce runtime verification coverage gates (#301)

.gitea/ISSUE_TEMPLATE/runtime_verification.md

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+---
+name: Runtime Verification Incident
+about: 실운영/스테이징 동작 검증 중 발견된 이상 징후 등록
+title: "[RUNTIME-VERIFY][SCN-XXX] "
+labels: runtime, verification
+---
+
+## Summary
+
+- 현상:
+- 최초 관측 시각(UTC):
+
+## Reproduction / Observation
+
+- 실행 모드(`live`/`paper`):
+- 세션(`NXT`, `US_PRE`, `US_DAY`, `US_AFTER`, ...):
+- 실행 커맨드:
+- 로그 경로:
+
+## Expected vs Actual
+
+- Expected:
+- Actual:
+
+## Requirement Mapping
+
+- REQ:
+- TASK:
+- TEST:
+
+## Temporary Mitigation
+
+- 즉시 완화책:
+
+## Close Criteria
+
+- [ ] Dev 수정 반영
+- [ ] Verifier 재검증 PASS
+- [ ] Runtime Verifier 재관측 PASS
+- [ ] `NOT_OBSERVED = 0`
+