test(custom-block): isolate custom-block rows fetch in execution-core test

Author: TheodoreSpeaks

apps/sim/lib/workflows/executor/execution-core.test.ts

@@ -59,6 +59,10 @@ vi.mock('@/lib/logs/execution/trace-spans/trace-spans', () => ({
 
 vi.mock('@/lib/workflows/persistence/utils', () => workflowsPersistenceUtilsMock)
 
+vi.mock('@/lib/workflows/custom-blocks/operations', () => ({
+  getCustomBlockRowsForWorkspace: vi.fn().mockResolvedValue([]),
+}))
+
 vi.mock('@sim/workflow-persistence/subblocks', () => ({
   mergeSubblockStateWithValues: mergeSubblockStateWithValuesMock,
 }))