Replace scheduled AUR imports with direct upstream watches

pkgbuilds/dropbox/.omarchy/package.json

@@ -1,5 +1,14 @@
 {
-  "source": "aur",
+  "source": "local",
   "release_ring": "fast",
-  "upstream_commit": "6379feda6f36bbbd496c97f040e4f71c5a1dcec7"
+  "upstream": {
+    "watch": {
+      "redirect": "https://www.dropbox.com/download?plat=lnx.x86_64",
+      "pattern": "dropbox-lnx\\.x86_64-(?P<version>[0-9]+\\.4\\.[0-9]+)\\.tar\\.gz"
+    }
+  },
+  "origin": {
+    "aur": "dropbox",
+    "commit": "6379feda6f36bbbd496c97f040e4f71c5a1dcec7"
+  }
 }