ci: fix exhaustive linting (#8238)

.golangci.yml

@@ -62,8 +62,6 @@ linters:
         - fmt.*
         - (go.uber.org/zap/zapcore.ObjectEncoder).AddObject
         - (go.uber.org/zap/zapcore.ObjectEncoder).AddArray
-    exhaustive:
-      ignore-enum-types: reflect.Kind|svc.Cmd
   exclusions:
     generated: lax
     presets:

context.go

@@ -207,6 +207,8 @@ func (ctx Context) LoadModule(structPointer any, fieldName string) (any, error)
 
 	var result any
 
+	// Unsupported field kinds return an error.
+	//exhaustive:ignore
 	switch val.Kind() {
 	case reflect.Slice:
 		if isJSONRawMessage(typ) {

modules/caddyhttp/responsewriter.go

@@ -98,6 +98,8 @@ func UnwrapResponseWriterAs[T any](w http.ResponseWriter) (T, bool) {
 
 func responseWriterPointer(w http.ResponseWriter) uintptr {
 	v := reflect.ValueOf(w)
+	// Only pointer-like kinds have stable identity.
+	//exhaustive:ignore
 	switch v.Kind() {
 	case reflect.Pointer, reflect.Map, reflect.Chan, reflect.Func, reflect.Slice, reflect.UnsafePointer:
 		if v.IsNil() {

service_windows.go

@@ -49,6 +49,8 @@ func (runner) Execute(args []string, request <-chan svc.ChangeRequest, status ch
 
 	for {
 		req := <-request
+		// Unsupported service controls are ignored.
+		//exhaustive:ignore
 		switch req.Cmd {
 		case svc.Interrogate:
 			status <- req.CurrentStatus