fix: update CACHEBUST to v2 to force fresh build

Dockerfile

@@ -18,8 +18,8 @@ RUN flutter config --enable-web
 
 # Copy dependency files first for better caching
 # Note: pubspec.lock will be generated by flutter pub get if missing
-# Cache buster - change this value to force rebuild
-ARG CACHEBUST=2024-12-08-v1
+# Cache buster - INCREMENT THIS VALUE TO FORCE REBUILD ON DEPLOY
+ARG CACHEBUST=2024-12-08-v2
 COPY pubspec.yaml ./
 
 # Get dependencies (generates pubspec.lock automatically)