ci(backend): 调整 embed server

backend/.github/workflows/ci.yml

@@ -14,10 +14,11 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version-file: go.mod
+          go-version-file: backend/go.mod
           check-latest: true
           cache: true
       - name: Run tests
+        working-directory: backend
         run: go test ./...
 
   golangci-lint:
@@ -26,11 +27,12 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version-file: go.mod
+          go-version-file: backend/go.mod
           check-latest: true
           cache: true
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v6
+        uses: golangci/golangci-lint-action@v9
         with:
-          version: latest
+          version: v2.7
           args: --timeout=5m
+          working-directory: backend