fix(release): enforce Android version parity (#141)

Adds a deterministic metadata guard before CI and F-Droid builds so generated release artifacts cannot silently inherit stale Gradle versions.\n\nPlan: https://github.com/dzianisv/opencode-mobile/issues/95#issuecomment-5047827673

Co-authored-by: engineer <engineer@gray-knight-m1.local>

.github/workflows/build.yml

@@ -23,6 +23,9 @@ jobs:
       - name: Install dependencies
         run: npm install --legacy-peer-deps
 
+      - name: Check release version metadata
+        run: npm run check:versions
+
       - name: Typecheck
         run: npm run typecheck