docs(config): default telegram group replies and track reliability hardening

docs/plans/state.json

@@ -5525,6 +5525,29 @@
         "docs/plans/state.json"
       ],
       "test_status": "pnpm test:run src/gateway/handlers/handlers.test.ts src/cli/setup/config.test.ts src/cli/setup/automation.test.ts + pnpm typecheck passing"
+    },
+    "telegram-reliability-hardening-diagnostics": {
+      "status": "completed",
+      "date": "2026-02-18",
+      "updated": "2026-02-18",
+      "summary": "Hardened Telegram channel reliability: default group behavior now responds without mention gating, adapter now records error metadata, retries transient Telegram API failures, and schedules reconnect attempts after polling/runtime faults. Surfaced adapter error diagnostics through gateway services/channels, dashboard service cards, and doctor Telegram status detail.",
+      "files_modified": [
+        "src/channels/telegram/adapter.ts",
+        "src/channels/telegram/adapter.test.ts",
+        "src/channels/types.ts",
+        "src/config/schema.ts",
+        "src/config/schema.test.ts",
+        "src/gateway/server.ts",
+        "src/gateway/handlers/system.ts",
+        "src/gateway/handlers/services.ts",
+        "src/gateway/handlers/services.test.ts",
+        "src/gateway/ui/pages/dashboard.js",
+        "src/cli/doctor.ts",
+        "config/default.yaml",
+        "README.md",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm test:run src/channels/telegram/adapter.test.ts src/config/schema.test.ts src/gateway/handlers/services.test.ts src/cli/doctor.test.ts + pnpm typecheck passing"
     }
   },
   "overall_progress": {