docs: R2-11 TagConfig consolidation + strictness rollout decisions

src/Server/ZB.MOM.WW.OtOpcUa.Host/appsettings.json

@@ -43,5 +43,9 @@
     "DrainIntervalSeconds": 5,
     "Capacity": 1000000,
     "DeadLetterRetentionDays": 30
+  },
+  "Deployment": {
+    "_comment": "R2-11 (05/CONV-2): deploy-gate TagConfig strictness. Warn (default) = non-blocking warnings logged + appended to the deployment result message; Error = a config with a typo'd enum or unparseable TagConfig is rejected at the draft gate. Running servers are untouched; the gate only sees re-deploys.",
+    "TagConfigValidationMode": "Warn"
   }
 }