feat: Gotify CRUD + internal handler dispatch for notification service

- Add internal handler support to ServiceAdapter (Handler field)
- Dispatcher routes to internal handler when set (no reverse proxy)
- GotifyClient: full CRUD (send/list/delete messages, CRUD applications)
- Refactor notification handler: route by X-Resource header, not body format
- Register notification as ServiceAdapter with auth required
- Resources: send-email, send-message, list-messages, delete-message,
  delete-all-messages, list-applications, create-application, delete-application
- Update examples: sendmsg-email.sh, gotify-crud.sh
- Env vars: GOTIFY_URL, GOTIFY_APP_TOKEN, GOTIFY_CLIENT_TOKEN

examples/sendmsg-email.sh

@@ -1,36 +1,20 @@
 #!/bin/bash
-# Example: Send email via notification/sendMsg endpoint
+# Example: Send email via notification service (X-Service routing)
 
 BASE_URL="${1:-https://api.riotpiao.com}"
-AUTH_TOKEN="${2:-}"  # Optional JWT token if auth required
+AUTH_TOKEN="${2:-}"
 
-PAYLOAD=$(cat <<'EOF'
-{
-  "format": "smtp",
-  "title": "System Alert",
-  "message": "CPU usage exceeded 90% threshold",
-  "priority": 7,
-  "extras": {
-    "to_email": "[email protected]",
-    "cc": "[email protected]"
-  }
-}
-EOF
-)
-
-if [ -n "$AUTH_TOKEN" ]; then
-  curl -X POST "$BASE_URL" \
-    -H "X-Service: notification" \
-    -H "X-Resource: sendMsg" \
-    -H "Content-Type: application/json" \
-    -H "Authorization: Bearer $AUTH_TOKEN" \
-    -d "$PAYLOAD"
-else
-  curl -X POST "$BASE_URL" \
-    -H "X-Service: notification" \
-    -H "X-Resource: sendMsg" \
-    -H "Content-Type: application/json" \
-    -d "$PAYLOAD"
-fi
+# Send email
+curl -s -X POST "$BASE_URL" \
+  -H "X-Service: notification" \
+  -H "X-Resource: send-email" \
+  -H "Content-Type: application/json" \
+  -H "Authorization: Bearer $AUTH_TOKEN" \
+  -d '{
+    "to": "[email protected]",
+    "cc": "[email protected]",
+    "subject": "System Alert",
+    "body": "CPU usage exceeded 90% threshold"
+  }' | jq .
 
 echo ""