Document overlay alert settings contract

contracts/v1/overlay-response.json

@@ -4,13 +4,16 @@
   "title": "Trixie public overlay",
   "type": "object",
   "additionalProperties": false,
-  "required": ["slug", "html", "css", "javascript", "enabled", "disabled_design"],
+  "required": ["slug", "html", "css", "javascript", "enabled", "disabled_design", "alert_group_window_ms", "alert_group_size", "alert_display_ms"],
   "properties": {
     "slug": { "type": "string", "pattern": "^[a-z0-9-]+$" },
     "html": { "type": "string" },
     "css": { "type": "string" },
     "javascript": { "type": "string" },
     "enabled": { "type": "boolean" },
-    "disabled_design": { "type": "string" }
+    "disabled_design": { "type": "string" },
+    "alert_group_window_ms": { "type": "integer", "minimum": 0, "maximum": 5000 },
+    "alert_group_size": { "type": "integer", "minimum": 1, "maximum": 20 },
+    "alert_display_ms": { "type": "integer", "minimum": 500, "maximum": 60000 }
   }
 }

fixtures/v1/overlay.response.json

@@ -4,5 +4,8 @@
   "css": "#alert { color: white; }",
   "javascript": "",
   "enabled": true,
-  "disabled_design": "transparent"
+  "disabled_design": "transparent",
+  "alert_group_window_ms": 200,
+  "alert_group_size": 5,
+  "alert_display_ms": 4000
 }