Add datasource quality and schema gates

webui/src/api/datasources.ts

@@ -87,6 +87,44 @@ export type DatasourceMaterialization = {
   governance: DatasourceGovernance;
 };
 
+export type DatasourceValidationDiagnostic = {
+  severity: "error" | "warning";
+  code: string;
+  message: string;
+  rule_id?: string;
+  affected_rows?: number;
+  row_numbers?: number[];
+  row_numbers_truncated?: boolean;
+  details?: Record<string, unknown>;
+};
+
+export type DatasourceSchemaChange = {
+  code: string;
+  classification: "compatible" | "warning" | "breaking";
+  message: string;
+  field?: string;
+  before?: DatasourceField;
+  after?: DatasourceField;
+};
+
+export type DatasourceStageValidation = {
+  version?: number;
+  policy_version?: string;
+  policy_hash?: string;
+  valid?: boolean;
+  errors?: DatasourceValidationDiagnostic[];
+  warnings?: DatasourceValidationDiagnostic[];
+  quality?: {
+    rules_evaluated?: number;
+    rules_passed?: number;
+    rules_failed?: number;
+  };
+  schema_change?: {
+    classification?: "new" | "compatible" | "warning" | "breaking";
+    changes?: DatasourceSchemaChange[];
+  };
+};
+
 export type DatasourceStage = {
   ref: string;
   name: string;
@@ -100,7 +138,7 @@ export type DatasourceStage = {
   schema: DatasourceField[];
   row_count?: number | null;
   byte_count?: number | null;
-  validation: Record<string, unknown>;
+  validation: DatasourceStageValidation;
   created_at?: string | null;
   promoted_at?: string | null;
   promoted_materialization_ref?: string | null;