Remove restore-keys fallback, exact key match only

action.yaml

@@ -31,8 +31,6 @@ runs:
 
         EXPANDED_PATH=$(eval echo "${{ inputs.path }}")
 
-        echo "cache-hit=false" >> $GITHUB_OUTPUT
-
         if [ -f "$ARCHIVE" ]; then
           echo "Cache hit: ${CACHE_KEY}"
           mkdir -p "$EXPANDED_PATH"
@@ -40,16 +38,7 @@ runs:
           echo "cache-hit=true" >> $GITHUB_OUTPUT
         else
           echo "Cache miss: ${CACHE_KEY}"
-          # Try restore-keys fallback
-          for prefix in ${{ inputs.restore-keys }}; do
-            FALLBACK=$(ls -t "${CACHE_DIR}/${prefix}"*.tar.xz 2>/dev/null | head -1)
-            if [ -n "$FALLBACK" ] && [ -f "$FALLBACK" ]; then
-              echo "Fallback hit: $(basename "$FALLBACK")"
-              mkdir -p "$EXPANDED_PATH"
-              tar -xf "$FALLBACK" -C "/" 2>/dev/null || true
-              break
-            fi
-          done
+          echo "cache-hit=false" >> $GITHUB_OUTPUT
         fi
 
     - name: Save cache