docs(ORCH-048): staging gate log — FAILED (9/10, B6 /projects 404 on stale staging)

Staging instance (8501) still runs a pre-ORCH-048 image without GET /projects,
so B6 deterministically FAILs (endpoint unavailable → no false PASS). Branch
code is correct; remediation is a host-side `--profile staging up -d --build`
of orchestrator-staging before re-running the gate.

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

docs/work-items/ORCH-048/15-staging-log.md

@@ -0,0 +1,94 @@
+---
+staging_status: FAILED
+timestamp: 2026-06-06T05:33:16Z
+base_url: http://localhost:8501
+mode: stub
+result: 9/10 checks PASS
+failed_checks:
+  - B6 Registry (GET /projects -> HTTP 404)
+---
+
+# Staging Gate Log — ORCH-048
+
+Staging test suite ran against the live staging instance (port 8501) and
+**FAILED**: 9 of 10 checks passed; check **B6** failed.
+
+## Verdict
+
+`staging_status: FAILED` (exit code 1).
+
+## Root cause — deploy ordering, NOT a code defect
+
+ORCH-048 introduces the `GET /projects` endpoint (`src/main.py:112`) and
+rewrites staging-check **B6** to read the project registry over HTTP from the
+running instance instead of importing `src.projects` locally
+(see `06-adr/ADR-001-b6-registry-via-http-endpoint.md`).
+
+The **branch code is correct** — the route is present in this worktree. The
+failure is that the **live staging container on 8501 is still running a
+pre-ORCH-048 image** that does not yet serve `/projects`:
+
+```
+GET http://localhost:8501/projects  -> HTTP 404 Not Found
+GET http://localhost:8501/health    -> HTTP 200 {"status":"ok",...}
+```
+
+Per the design canon (architecture/README.md §"Условный staging-гейт", and
+ADR-001), an unavailable `/projects` endpoint is a **deterministic FAIL** —
+the check refuses to emit a false PASS when it cannot read the live registry.
+That is the behaviour observed here.
+
+## Required remediation
+
+The staging sandbox must be redeployed with this branch's code **before** the
+gate can pass — the canonical deploy-staging flow (STAGING_CHECK.md, deploy-hook
+section) runs the check *after* a staging rebuild:
+
+```bash
+# host: mva154 — SAFE, isolated 8501 sandbox; does NOT touch prod 8500
+docker compose --profile staging up -d --build orchestrator-staging
+docker exec orchestrator-staging \
+  python3 /repos/orchestrator/scripts/staging_check.py --mode stub
+```
+
+This redeploy could not be performed from the deployer sandbox (no docker
+access; host-side operation), so the check was run against the stale instance.
+Once staging serves ORCH-048's `/projects`, B6 returns the live registry
+(`known_plane_project_ids` = sandbox only, prod ET/ORCH absent) and is expected
+to PASS, yielding `staging_status: SUCCESS`.
+
+## Full suite output
+
+```
+============================================================
+  ORCH-33 Staging Check Suite
+  base_url : http://localhost:8501
+  mode     : stub
+  utc_time : 2026-06-06T05:30:35.201677+00:00
+============================================================
+
+[Block A] SMOKE
+  ✓ PASS  A1 GET /health → 200 status=ok  [HTTP 200, body={'status': 'ok', 'service': 'orchestrator'}]
+  ✓ PASS  A2 GET /queue → 200 with counts/max_concurrency/resilience  [HTTP 200, keys=['counts', 'max_concurrency', 'poll_interval', 'resilience', 'recent']]
+  ✓ PASS  A3 ORCH_STAGING=true (not prod)  [ORCH_STAGING=true]
+
+[Block B] ACCESS
+  ✓ PASS  B4 Plane: sandbox project accessible  [HTTP 200, found 5 project(s), sandbox=YES]
+  ✓ PASS  B5 Gitea: orchestrator-sandbox accessible, push=true  [HTTP 200, permissions={'admin': True, 'push': True, 'pull': True}]
+  ✗ FAIL  B6 Registry: sandbox present, prod ET/ORCH absent  [GET /projects → HTTP 404]
+
+[Block C] E2E  (mode=stub)
+  ✓ PASS  C7 Create issue in Plane SANDBOX  [HTTP 201, issue_id=f95d5b4b-ae3c-4e39-a6a7-443f7131835c]
+  ✓ PASS  C8 Trigger pipeline via /webhook/plane  [HTTP 200, resp={'status': 'accepted'}]
+  ✓ PASS  C9a Branch appears in orchestrator-sandbox  [branch=feature/SANDBOX-012-staging-check-e2e-20260606t053]
+  ✓ PASS  C9b Analyst job enqueued in staging queue  [job_id=8, status=queued, agent=analyst]
+
+[CLEANUP]
+  ✓ PASS  CLEANUP: deleted branch 'feature/SANDBOX-012-staging-check-e2e-20260606t053' (HTTP 204)
+  ✓ PASS  CLEANUP: deleted Plane issue f95d5b4b-ae3c-4e39-a6a7-443f7131835c (HTTP 204)
+
+============================================================
+  RESULT: 9/10 checks PASS
+============================================================
+exit code: 1
+```