docs: record Gen2 deployment recovery evidence

dev/ACTIVE_TASK.json

@@ -1 +1 @@
-{"task_file":"dev/tasks/GEN2-DEPLOY-001-supervisor-and-production-rollback.json","task_id":"GEN2-DEPLOY-001","task_revision":1}
+{"task_file":"dev/tasks/GEN2-027-production-canary-and-controlled-gen2-traffic-transition.json","task_id":"GEN2-027","task_revision":1}

docs/evidence/gen2-deploy-001-production-recovery-2026-08-29.json

@@ -0,0 +1,44 @@
+{
+  "evidence_id": "gen2-deploy-001-production-recovery-2026-08-29",
+  "task_id": "GEN2-DEPLOY-001",
+  "production_revision_before": "36fc8ec",
+  "production_revision_after": "2083096aedaec73191e0bc9e2566f596e1810d82",
+  "topology": {
+    "supervisor": "assistant-supervisor-1",
+    "public_traffic": "Supervisor reverse proxy on creator web host port",
+    "control_api": "Supervisor loopback-only host control port",
+    "durable_state": "assistant_assistant_supervisor_state:/var/lib/supervisor/release-state.json",
+    "candidate": "assistant-creator-web-candidate-1"
+  },
+  "canary": {
+    "candidate_health": "healthy",
+    "header_route": "X-Assistant-Canary=true -> candidate",
+    "header_route_http": 200,
+    "promoted": true
+  },
+  "rollback": {
+    "drill": "candidate container stopped, Supervisor traffic rollback and release rollback invoked",
+    "stable_http": 200,
+    "stable_target_header": "stable",
+    "supervisor_restart": "healthy; traffic_mode=STABLE and stable release state restored"
+  },
+  "postgres_recovery": {
+    "restart": "healthy",
+    "public_healthz": 200,
+    "public_readyz": 200
+  },
+  "cognitive_lifeboat": {
+    "previous_status": "restart loop/unhealthy",
+    "cause": "configured Qwen3-8B-Q4_K_M.gguf was absent from llm-local-models volume",
+    "remediation": "compose model reference changed to existing Qwen3.8-27B-UD-Q2_K_XL.gguf",
+    "current_status": "healthy",
+    "role": "local degraded cognitive provider; not Supervisor"
+  },
+  "smoke": {
+    "public_healthz": 200,
+    "public_readyz": 200,
+    "public_login": 200,
+    "authenticated_household": "UNVERIFIED: browser session was unauthenticated; no credentials were read or entered"
+  },
+  "interpretation": "Supervisor independence, durable release state, controlled header canary, stable rollback and restart recovery are production-observed. Authenticated household acceptance remains an explicit gap."
+}