Migrate from Zod v3 to v4 (#14639)

Closes [#1526](https://github.com/twentyhq/core-team-issues/issues/1526)

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Co-authored-by: Félix Malfait <felix@twenty.com>
Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-shared/src/workflow/schemas/workflow-action-schema.ts

@@ -0,0 +1,28 @@
+import { z } from 'zod';
+import { workflowAiAgentActionSchema } from './ai-agent-action-schema';
+import { workflowCodeActionSchema } from './code-action-schema';
+import { workflowCreateRecordActionSchema } from './create-record-action-schema';
+import { workflowDeleteRecordActionSchema } from './delete-record-action-schema';
+import { workflowEmptyActionSchema } from './empty-action-schema';
+import { workflowFilterActionSchema } from './filter-action-schema';
+import { workflowFindRecordsActionSchema } from './find-records-action-schema';
+import { workflowFormActionSchema } from './form-action-schema';
+import { workflowHttpRequestActionSchema } from './http-request-action-schema';
+import { workflowIteratorActionSchema } from './iterator-action-schema';
+import { workflowSendEmailActionSchema } from './send-email-action-schema';
+import { workflowUpdateRecordActionSchema } from './update-record-action-schema';
+
+export const workflowActionSchema = z.discriminatedUnion('type', [
+  workflowCodeActionSchema,
+  workflowSendEmailActionSchema,
+  workflowCreateRecordActionSchema,
+  workflowUpdateRecordActionSchema,
+  workflowDeleteRecordActionSchema,
+  workflowFindRecordsActionSchema,
+  workflowFormActionSchema,
+  workflowHttpRequestActionSchema,
+  workflowAiAgentActionSchema,
+  workflowFilterActionSchema,
+  workflowIteratorActionSchema,
+  workflowEmptyActionSchema,
+]);