fix(spec): unwrap SQL wrapper metadata types

pkg/resolvemcp/tools_test.go

@@ -0,0 +1,34 @@
+package resolvemcp
+
+import (
+	"testing"
+
+	"github.com/bitechdev/ResolveSpec/pkg/spectypes"
+)
+
+func TestBuildModelInfo_UnwrapsSQLTypes(t *testing.T) {
+	type related struct {
+		ID int64 `json:"id"`
+	}
+	type model struct {
+		Name     spectypes.SqlString `gorm:"column:name" json:"name"`
+		Metadata spectypes.SqlJSONB  `gorm:"column:metadata;type:jsonb" json:"metadata"`
+		Related  related             `json:"related"`
+	}
+
+	info := buildModelInfo("public", "models", model{})
+	columns := make(map[string]columnInfo, len(info.columns))
+	for _, column := range info.columns {
+		columns[column.jsonName] = column
+	}
+
+	if column, ok := columns["name"]; !ok || column.goType != "string" || !column.nullable {
+		t.Errorf("expected name SQL wrapper column, got %+v", column)
+	}
+	if column, ok := columns["metadata"]; !ok || !column.nullable {
+		t.Errorf("expected metadata SQL wrapper column, got %+v", column)
+	}
+	if len(info.relationNames) != 1 || info.relationNames[0] != "related" {
+		t.Errorf("expected only related to be a relation, got %v", info.relationNames)
+	}
+}