chore: update golangci-lint to v2.13.0

Migrate the deprecated gofumpt `extra-rules` to `extra.group-params`, as
the alias now also enables the new `clothe-returns` and `balance-calls`
rules. Disable SA4023, which hangs on go 1.27, see
https://github.com/golangci/golangci-lint/issues/6732.

Apply the resulting modernize fixes, mostly flattening embedded struct
literals and switching errors.As to errors.AsType.

Assisted-by: Claude:Opus 5

modules/log/logger_impl.go

@@ -184,7 +184,7 @@ func asLogStringer(v any) LogStringer {
 		// in case the receiver is a pointer, but the value is a struct
 		vp := reflect.New(a.Type())
 		vp.Elem().Set(a)
-		if s, ok := vp.Interface().(LogStringer); ok {
+		if s, ok := reflect.TypeAssert[LogStringer](vp); ok {
 			return s
 		}
 	}