Move CI to Gitea: run-number offset, Cloudflare-only publishing

- plgVersionRunOffset=1000: stamped build number is run number + offset, so
  Gitea's restarted run counter cannot produce a versionCode below an
  installed one (GitHub reached prod 30, dev ~172). Tags and versionName use
  the same number.
- Drop the GitHub release steps; plg.wallacenet.ca is the only channel.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01JdMNbY5hLR7FjtfEE712xG

.github/workflows/release.yml

@@ -61,7 +61,10 @@ jobs:
           # it cannot name different versions.
           series="$(sed -n 's/^plgVersionSeries=//p' gradle.properties)"
           test -n "$series"
-          version="v${series}.${{ github.run_number }}"
+          offset="$(sed -n 's/^plgVersionRunOffset=//p' gradle.properties)"
+          test -n "$offset"
+          # Same arithmetic as build.gradle.kts, so the tag names the APK's own number.
+          version="v${series}.$(( ${{ github.run_number }} + offset ))"
           src="app/build/outputs/apk/debug/app-debug.apk"
           dest="ProLibertateGames-${version}.apk"
           cp "$src" "$dest"
@@ -80,28 +83,8 @@ jobs:
           path: ${{ steps.stage.outputs.apk }}
           if-no-files-found: error
 
-      - name: Create GitHub release
-        env:
-          GH_TOKEN: ${{ github.token }}
-        run: |
-          set -euo pipefail
-          gh release create "${{ steps.stage.outputs.version }}" \
-            "${{ steps.stage.outputs.apk }}" \
-            "ProLibertateGames.apk" \
-            --repo "${{ github.repository }}" \
-            --target "${{ github.sha }}" \
-            --title "ProLibertateGames ${{ steps.stage.outputs.version }}" \
-            --notes "Automated release built from \`${{ github.sha }}\` on push to \`main\`.
-
-          Download **${{ steps.stage.outputs.apk }}** below and install it on an Android device (you may need to allow *Install unknown apps*). This is a debug-signed build.
-
-          Both files below are the same build. \`ProLibertateGames.apk\` is a copy under a fixed name, so this link always fetches the newest release and can be bookmarked or shared:
-
-          https://github.com/${{ github.repository }}/releases/latest/download/ProLibertateGames.apk"
-
-  # Publishes the build to https://plg.wallacenet.ca (Cloudflare Pages). Runs
-  # alongside the GitHub release above for one deployment so already-installed
-  # apps, which still read GitHub, can fetch the updater that reads Cloudflare.
+  # Publishes the build to https://plg.wallacenet.ca (Cloudflare Pages), which is
+  # the only release channel: the in-app updater reads latest.json from there.
   #
   # Both workflows deploy into one Pages site, and a deploy replaces the whole
   # site, so they share a concurrency group and never run at the same time.