fix(ci): downgrade golangci-lint-action to v3 for Gitea compatibility

Downgrade golangci-lint-action from v4 to v3 to match other actions
that were downgraded for Gitea compatibility (upload-artifact, codecov).
v4 actions are not fully supported on Gitea/GHES.

.github/workflows/ci.yml

@@ -79,11 +79,10 @@ jobs:
           go-version: '1.24'
 
       - name: Run golangci-lint
-        uses: golangci/golangci-lint-action@v4
+        uses: golangci/golangci-lint-action@v3
         with:
           version: latest
           args: --timeout=5m
-          skip-cache: true  # Skip cache to avoid BusyBox tar compatibility issues
 
   build:
     name: Build