use multi stage caching

action.yaml

@@ -42,6 +42,12 @@ runs:
       env:
         INPUT_BUILD_ARGS: ${{ inputs.build_args }}
       run: |
+        # 0. Enforce cache elision feature flags at the binary execution layer
+        export FF_KANIKO_SKIP_CACHED_STAGES=true
+        export FF_KANIKO_INFER_CROSS_STAGE_CACHE_KEY=true
+        export FF_KANIKO_CACHE_LOOKAHEAD=true
+        export FF_KANIKO_ROLLING_CACHE_KEY=true
+
         # 1. Initialize Kaniko Docker config directory
         mkdir -p /kaniko/.docker