test(09-03): add failing test for strict form schema compilation

- All locked field kinds, empty and single documents, and source order fail closed
- Unknown keys, types, duplicates, path escape, modelClass, partials, and missing assets must name the plugin, controller, and file

cabana/form_schema.go

@@ -0,0 +1,28 @@
+package cabana
+
+import (
+	"fmt"
+	"io/fs"
+
+	"git.golem15.com/golem15/summercms/pact"
+)
+
+// FormSchema is the boot-compiled form contract. The RED stub rejects every
+// asset so the ADMIN-01 tests fail on the contract, not on a missing symbol.
+type FormSchema struct{}
+
+// CompileForm will compile config_form.yaml and fields.yaml. It does not yet.
+func CompileForm(pluginID string, ctl pact.AdminController, fsys fs.FS) (*FormSchema, error) {
+	if pluginID == "" || ctl == nil || fsys == nil {
+		return nil, fmt.Errorf("cabana: form schema is not implemented")
+	}
+	return nil, fmt.Errorf("cabana: form schema is not implemented")
+}
+
+// CanonicalJSON will emit the stable form contract. It does not yet.
+func (s *FormSchema) CanonicalJSON() ([]byte, error) {
+	if s == nil {
+		return nil, fmt.Errorf("cabana: form schema is not implemented")
+	}
+	return nil, fmt.Errorf("cabana: form schema is not implemented")
+}