ci: replace manual sqlite driver download with go mod tidy

The workflow previously ran `go get auth-proxy/src` to download the sqlite driver
separately before downloading dependencies. This step has been removed and replaced
with `go mod tidy`, which is the idiomatic Go approach for managing dependencies.
It ensures go.mod is properly formatted and removes unused dependencies, eliminating
the need for manual driver installation steps.

.github/workflows/ci-cd.yml

@@ -19,12 +19,12 @@ jobs:
       - name: Set go proxy mirror
         run: /usr/local/go/bin/go env -w GOPROXY=https://go.iranserver.com/repository/go/ && /usr/local/go/bin/go env -w GOSUMDB=off
 
-      - name: Download sqlite go driver
-        run: /usr/local/go/bin/go get auth-proxy/src
-
       - name: Download dependencies
         run: /usr/local/go/bin/go mod download
 
+      - name: Tidy modules
+        run: /usr/local/go/bin/go mod tidy
+
       - name: Check formatting
         run: |
           if [ "$(/usr/local/go/bin/gofmt -l $(find . -name '*.go' -not -path './vendor/*'))" ]; then