release: bump to 0.1.0+2 and add promote_production fastlane lane

apps/app_seeds/fastlane/Fastfile

@@ -34,4 +34,22 @@ platform :android do
       skip_upload_apk: true,
     )
   end
+
+  # Promote the release currently on the internal track to production, reusing
+  # the SAME already-reviewed AAB (no rebuild, no new versionCode). Requires the
+  # service account to have "Release to production" permission in Play Console.
+  # Usage:  bundle exec fastlane promote_production
+  desc "Promote the internal-track release to production (no rebuild)"
+  lane :promote_production do
+    supply(
+      track: "internal",
+      track_promote_to: "production",
+      skip_upload_aab: true,
+      skip_upload_apk: true,
+      skip_upload_metadata: true,
+      skip_upload_changelogs: true,
+      skip_upload_images: true,
+      skip_upload_screenshots: true,
+    )
+  end
 end