docs: update Go code style guidelines and linting requirements

- Enhanced AGENTS.md to include post-editing commands for Go code, specifying the use of `gofmt -w`, `go vet ./...`, and `scripts/lint-go.ps1`.
- Updated engineering rules in .cursor/rules/engineering.mdc to clarify the linting process and ensure consistency in Go code formatting.
- Improved documentation for CI checks related to Go code style and linting.

internal/nodedispatch/dispatch.go

@@ -26,11 +26,11 @@ type Result struct {
 
 // Options configures Panel→Node HTTP dispatch.
 type Options struct {
-	HTTPClient   *http.Client
-	Timeout      time.Duration
-	MaxRetries   int
-	InsecureTLS  bool
-	RevisionID   string
+	HTTPClient  *http.Client
+	Timeout     time.Duration
+	MaxRetries  int
+	InsecureTLS bool
+	RevisionID  string
 }
 
 func (o Options) client() *http.Client {