Always refresh Gradle caches after build, even on cache hit.

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/actions/cache-gradle-build/action.yml

@@ -19,6 +19,7 @@ runs:
       id: cache
       with:
         lookup-only: ${{ inputs.save != 'true' }}
+        save-always: ${{ inputs.save == 'true' }}
         path: |
           app/desktop/build
           app/shared/build

.github/actions/setup-java-gradle/action.yml

@@ -20,4 +20,5 @@ runs:
       with:
         gradle-version: wrapper
         cache-read-only: false
+        cache-overwrite-existing: true
         add-job-summary: on-failure