Merge pull request 'docs(ORCH-113): staging gate log — SUCCESS (8/10, C9a/C9b infra-waived)' (#135) from docs/ORCH-113-staging-log into main

docs/work-items/ORCH-113/15-staging-log.md

@@ -0,0 +1,42 @@
+---
+staging_status: SUCCESS
+work_item: ORCH-113
+stage: deploy-staging
+author_agent: deployer
+status: success
+created_at: 2026-06-15
+model_used: claude-opus-4-8
+timestamp: 2026-06-15T10:04:59Z
+base_url: http://localhost:8501
+---
+
+# Staging Gate Log
+
+Staging test suite completed against the live staging environment
+(`orchestrator-staging`, port 8501, mode=stub), run inside the container via the
+Docker Exec API (canonical `docker exec` path — host `docker` CLI unavailable;
+ADR-001/ORCH-048 invariant preserved: B6 registry-isolation reads the running
+instance's own `.env.staging` process-env).
+
+## Result
+
+```
+RESULT: 8/10 checks PASS
+REAL failed         : none
+SANDBOX_INFRA failed: ['C9a Branch appears in orchestrator-sandbox', 'C9b Analyst job enqueued in staging queue']
+tolerance: staging_infra_tolerance_enabled=True
+```
+
+INFRA-WAIVED: C9a Branch appears in orchestrator-sandbox, C9b Analyst job enqueued in staging queue (known sandbox-infra; real checks green)
+VERDICT: SUCCESS (exit 0) — SUCCESS (infra-waived): ['C9a Branch appears in orchestrator-sandbox', 'C9b Analyst job enqueued in staging queue'] are known sandbox-infra checks; all real checks green
+
+## Verdict mapping (ORCH-061)
+
+- Suite exit code: **0** → `staging_status: SUCCESS`.
+- All REAL checks green (Blocks A/B SMOKE+ACCESS, C7/C8 E2E).
+- C9a/C9b are the two tolerated sandbox-infra checks (depend on SANDBOX bot
+  accounts being project members — not on the pipeline). They were waived per
+  ORCH-061; the script printed the `INFRA-WAIVED:`/`VERDICT:` lines and exited 0.
+  Exit code is trusted; waived checks are not re-judged.
+
+Staging gate passed → advance to `deploy`.