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-trigger-schema.ts

@@ -0,0 +1,12 @@
+import { z } from 'zod';
+import { workflowCronTriggerSchema } from './cron-trigger-schema';
+import { workflowDatabaseEventTriggerSchema } from './database-event-trigger-schema';
+import { workflowManualTriggerSchema } from './manual-trigger-schema';
+import { workflowWebhookTriggerSchema } from './webhook-trigger-schema';
+
+export const workflowTriggerSchema = z.discriminatedUnion('type', [
+  workflowDatabaseEventTriggerSchema,
+  workflowManualTriggerSchema,
+  workflowCronTriggerSchema,
+  workflowWebhookTriggerSchema,
+]);