Add strict custom field registry

toolkit/internal/gsp/load.go

@@ -33,6 +33,11 @@ func LoadProject(root string) (*Project, error) {
 		project.LoadIssues = append(project.LoadIssues, Issue{Level: "error", Code: "manifest_error", File: "gsp.manifest", Message: err.Error()})
 	}
 	project.Manifest = manifest
+	fields, err := loadFieldRegistry(absRoot, project.Manifest)
+	if err != nil {
+		project.LoadIssues = append(project.LoadIssues, Issue{Level: "error", Code: "field_registry_error", File: project.Manifest.fieldRegistryPath(), Message: err.Error()})
+	}
+	project.Fields = fields
 
 	var files []string
 	for _, scanEntry := range project.Manifest.scanEntries() {
@@ -98,6 +103,14 @@ func readUnit(root, file string) (*Unit, error) {
 	if err := yaml.Unmarshal(data, &unit); err != nil {
 		return nil, err
 	}
+	var raw map[string]any
+	if err := yaml.Unmarshal(data, &raw); err != nil {
+		return nil, err
+	}
+	unit.RawFields = map[string]any{}
+	for key, value := range raw {
+		unit.RawFields[key] = normalizeRawYAML(value)
+	}
 	unit.File = relPath(root, file)
 	return &unit, nil
 }