feat(05-05): accept boolean validation token

- Treat Laravel boolean as a type-check no-op in lagoon.Validate
- Settings.search_use_typesense uses this rule string

lagoon/validate.go

@@ -85,6 +85,8 @@ func validateField(ctx context.Context, tx *gorm.DB, model any, field, rule stri
 			tags = append(tags, oneofTag(strings.Split(arg, ",")))
 		case "unique":
 			uniqueTable = arg
+		case "boolean":
+			// Go's bool field type already enforces this; treat as a type-check no-op.
 		default:
 			return nil, fmt.Errorf("lagoon: unrecognized validation rule %q", tok)
 		}