Make delivery and integration failures explicit

Persist reminder presentations and retry state, atomically complete collapsed deliveries, fall back across away reaches, and block permanent failures visibly (V-715, V-678). Fail closed when enabled integrations lack credentials and keep remote arms explicitly dark (V-691). Give mavweb one sanitized, request-correlated error contract (V-689). Owner explicitly requested direct commits to master.

deploy/mavend.json

@@ -31,14 +31,14 @@
     "rule — three things in series that have each failed once, and when they do",
     "a sev4 nudge has nowhere to go. ntfy shares none of them: it is reached",
     "directly, no relay.",
-    "It is not only a spare. The routing table sends sev3-away and away",
-    "reminders here and NOWHERE else, so with this block absent those two",
-    "routes hit a nil sink and vanish without a log or an outbox row.",
+    "It is the preferred away reach. Reminders fall back to Telegram in order,",
+    "and every missing reach is recorded in the outbox rather than disappearing.",
     "The credential is an ntfy access token, scoped write-only to this one",
     "topic, so a popped sink can push to it and cannot read it back. Set it in",
     "deploy/telegram.env beside the telegram secrets; that file is gitignored."
   ],
   "ntfy": {
+    "disabled": true,
     "base_url": "https://ntfy.kvmx.ru",
     "topic": "maven",
     "token": "${NTFY_TOKEN}"
@@ -76,7 +76,9 @@
     "resident model without saying so. Deleting this block restores exactly",
     "the behaviour homesrv had before it existed.",
     "Addressed by LAN address, not container name: mavgpud runs on another",
-    "machine and there is no shared docker network to name it on."
+    "machine and there is no shared docker network to name it on.",
+    "model_disabled keeps only this model arm dark until MAVEN_GPU_TOKEN is",
+    "provisioned; the independently authenticated STT arm below stays live."
   ],
   "//workstation.stt": [
     "CrisperWhisper 2.0 turbo on the same machine, a second service on port",
@@ -93,6 +95,7 @@
     "The token is what stops anything on the LAN posting audio to that port."
   ],
   "workstation": {
+    "model_disabled": true,
     "url": "http://192.168.1.105:8080",
     "token": "${MAVEN_GPU_TOKEN}",
     "probe": "15s",