Make fresh router startup reliable

install.sh

@@ -319,8 +319,21 @@ build_and_start() {
   docker compose --env-file "$SECRETS_DIR/stack.env" up -d --build \
     profile-controller router open-webui
 
+  log "Auf gesunden Router warten"
+  local deadline=$((SECONDS + 180))
+  until [ "$(docker inspect --format '{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}' mike-ai-router 2>/dev/null || true)" = "healthy" ]; do
+    if (( SECONDS >= deadline )); then
+      docker logs --tail 80 mike-ai-router >&2 || true
+      die "Router wurde nicht rechtzeitig gesund"
+    fi
+    sleep 2
+  done
+
   log "Fast-Profil aktivieren und Readiness prüfen"
-  docker compose --env-file "$SECRETS_DIR/stack.env" exec -T router python - <<'PY'
+  # Use docker exec directly here. Some Compose/Docker combinations return a
+  # transient HTTP 409 while upgrading the exec stream immediately after a
+  # freshly built service has been recreated.
+  docker exec -i mike-ai-router python - <<'PY'
 import json, os, time, urllib.request
 key = os.environ["ROUTER_API_KEY"]
 request = urllib.request.Request(