fix: resolve CI failures for ELF-231 merge

- Format cmd/loadtest/main.go with gofmt
- Downgrade go.mod to go 1.24 for golangci-lint compatibility
- Update CI workflow Go version to 1.24
- Fix deprecated govet check-shadowing → shadow

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
 
       - uses: actions/setup-go@v5
         with:
-          go-version: '1.25'
+          go-version: '1.24'
           cache: true
 
       - name: Check formatting
@@ -56,7 +56,7 @@ jobs:
 
       - uses: actions/setup-go@v5
         with:
-          go-version: '1.25'
+          go-version: '1.24'
           cache: true
 
       - name: Run golangci-lint

.golangci.yml

@@ -19,7 +19,8 @@ linters-settings:
     check-type-assertions: true
     check-blank: true
   govet:
-    check-shadowing: true
+    enable:
+      - shadow
   revive:
     rules:
       - name: blank-imports

cmd/loadtest/main.go

@@ -96,4 +96,4 @@ func main() {
 		fmt.Printf("Max latency: %.2f ms\n", float64(atomic.LoadInt64(&maxLatency))/1000)
 		fmt.Printf("Requests/sec: %.2f\n", float64(*total)/duration.Seconds())
 	}
-}
+}