fix(clickhouse): make table data fully read-only

Add readonly flag to TableDataCapability and check it in
isTableDataEditable and canEditExistingTableRows to prevent
cell editing for databases like ClickHouse that don't support
row-level UPDATE/DELETE.

src/lib/databaseTableDataCapabilities.ts

@@ -9,6 +9,7 @@ export interface TableDataCapability {
   deleteRequiresPrimaryKey: boolean;
   requiresTransactionalTableForExistingRows: boolean;
   transaction: boolean;
+  readonly?: boolean;
 }
 
 export interface DatabaseCapability {
@@ -73,6 +74,7 @@ const DATABASE_CAPABILITY_OVERRIDES: Partial<Record<DatabaseType, Partial<Databa
       deleteRequiresPrimaryKey: true,
       requiresTransactionalTableForExistingRows: false,
       transaction: false,
+      readonly: true,
     },
   },
 };

src/lib/tableEditing.ts

@@ -13,7 +13,9 @@ export function editablePrimaryKeys(databaseType: DatabaseType | undefined, colu
 }
 
 export function isTableDataEditable(databaseType: DatabaseType | undefined, primaryKeys: string[]): boolean {
-  if (getDatabaseCapability(databaseType).tableData.insert) return true;
+  const cap = getDatabaseCapability(databaseType).tableData;
+  if (cap.readonly) return false;
+  if (cap.insert) return true;
   return primaryKeys.length > 0;
 }
 
@@ -27,6 +29,7 @@ export function canEditExistingTableRows(
   primaryKeys?: string[],
 ): boolean {
   const tableData = getDatabaseCapability(databaseType).tableData;
+  if (tableData.readonly) return false;
   if (tableData.requiresTransactionalTableForExistingRows && hiveTableTransactional !== true) return false;
   if (tableData.updateRequiresPrimaryKey && primaryKeys && primaryKeys.length === 0) return false;
   return true;