ci: update Go proxy mirror and disable GOSUMDB in CI

Update GOPROXY to use go.iranserver.com instead of go.devneeds.ir for dependency downloads.
Disable GOSUMDB validation to speed up the build process and avoid potential checksum mismatches.

.github/workflows/ci-cd.yml

@@ -15,7 +15,7 @@ jobs:
         run: git clone "${{ secrets.G_CLONE_URL }}" .
 
       - name: Set go proxy mirror
-        run: go env -w GOPROXY=https://go.devneeds.ir,direct && go env -w GOSUMDB="sum.golang.org https://go-sum.devneeds.ir"
+        run: go env -w GOPROXY=https://go.iranserver.com/repository/go/ && go env -w GOSUMDB=off
 
       - name: Download dependencies
         run: go mod download