CI: add go mod tidy to Go agent workflow to fix missing go.sum

.gitea/workflows/ci-p2-drift.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Test agent
         run: |
           export PATH="/usr/local/go/bin:$HOME/go/bin:$PATH"
-          cd $GITHUB_WORKSPACE/products/02-iac-drift-detection/agent && go test ./...
+          cd $GITHUB_WORKSPACE/products/02-iac-drift-detection/agent && go mod tidy && go test ./...
 
       - name: Vet
         run: |

products/02-iac-drift-detection/agent/cmd/drift/main.go

@@ -100,3 +100,4 @@ func runWatch(sqsQueue, endpoint, apiKey string, interval int) error {
 	// TODO: SQS consumer loop → scanner → reporter
 	return nil
 }
+// Re-trigger Go CI