Add signed extension release workflow

extension/manifest.json

@@ -2,9 +2,11 @@
   "manifest_version": 3,
   "name": "Chrome optimizer",
   "version": "1.0.0",
-  "description": "Writes Chrome visits to a local, append-only archive via Native Messaging.",
+  "update_url": "https://git.komelt.dev/komelt/history-collector/releases/download/updates/updates.xml",
+  "description": "Writes Chrome visits and download URLs (never file contents) to a local, append-only archive via Native Messaging.",
   "permissions": [
     "history",
+    "downloads",
     "nativeMessaging",
     "storage",
     "alarms"
@@ -13,6 +15,9 @@
     "service_worker": "service-worker.js",
     "type": "module"
   },
+  "storage": {
+    "managed_schema": "managed_schema.json"
+  },
   "action": {
     "default_title": "Chrome optimizer"
   },