docs(ORCH-022): staging gate log — staging_status SUCCESS

Canonical staging_check.py run inside orchestrator-staging:
8/10 PASS, all REAL checks green, C9a/C9b infra-waived (ORCH-061),
exit 0 → advance.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docs/work-items/ORCH-022/15-staging-log.md

@@ -0,0 +1,30 @@
+---
+staging_status: SUCCESS
+timestamp: 2026-06-07T18:02:27+00:00
+base_url: http://localhost:8501
+---
+
+# Staging Gate Log
+
+Staging test suite completed via canonical run (ORCH-048, ADR-001):
+
+```
+docker exec orchestrator-staging \
+  python3 /repos/orchestrator/scripts/staging_check.py \
+  --base-url http://localhost:8501 --mode stub
+```
+
+**Result: 8/10 checks PASS — exit code 0 (advance).**
+
+All REAL (pipeline) checks green: A1, A2, A3 (SMOKE), B4, B5, B6 (ACCESS), C7, C8 (E2E).
+
+Two sandbox-infra-only checks failed and were waived per ORCH-061
+(`staging_infra_tolerance_enabled=True`) — these depend on SANDBOX bot accounts
+being members of the SANDBOX Plane project, not on the pipeline:
+
+```
+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
+```
+
+Cleanup ran (Plane SANDBOX test issue deleted, HTTP 204). Exit code 0 → `staging_status: SUCCESS`.