fix(workflow): label manual trigger record output as Record/Records (#21832)

## What

The manual trigger output schema exposed the triggering record(s) under
a node labeled **Payload**. Relabels it to match what the node actually
contains:

- **Single-record** availability → **Record**
- **Bulk-records** availability → **Records**

## Why

"Payload" was a misnomer — the node holds the record(s) that triggered
the workflow. This is a display-label-only change.

## Notes for reviewers

- **No migration.** The persisted output schema key stays `payload`, so
existing variable references (`{{trigger.payload.x}}`) are unaffected.
- The front recomputes the output schema on the fly
(`computeStepOutputSchema`), so the variable picker shows the new labels
immediately, including for existing triggers.
- The backend (`workflow-schema.workspace-service`) is updated to match
for newly persisted/re-saved schemas. Previously persisted schemas keep
"Payload" until re-saved.
- Added `WORKFLOW_TRIGGER_RECORD_LABEL` /
`WORKFLOW_TRIGGER_RECORDS_LABEL` and removed the now-unused
`WORKFLOW_TRIGGER_PAYLOAD_LABEL`.
- Unit tests updated for both single and bulk cases (55/55 passing).

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packages/twenty-front/src/modules/workflow/workflow-variables/utils/generate/__tests__/computeStepOutputSchema.test.ts

@@ -199,7 +199,7 @@ describe('computeStepOutputSchema', () => {
 
       expect((result as any).payload).toMatchObject({
         isLeaf: false,
-        label: 'Payload',
+        label: 'Record',
       });
       expect((result as any).payload.value).toHaveProperty(
         '_outputSchemaType',
@@ -223,6 +223,10 @@ describe('computeStepOutputSchema', () => {
         objectMetadataItems: [mockCompanyObjectMetadataItem],
       });
 
+      expect((result as any).payload).toMatchObject({
+        isLeaf: false,
+        label: 'Records',
+      });
       expect((result as any).payload.value).toHaveProperty('companies');
       expect((result as any).payload.value.companies).toMatchObject({
         isLeaf: true,

packages/twenty-front/src/modules/workflow/workflow-variables/utils/generate/computeStepOutputSchema.ts

@@ -15,7 +15,8 @@ import {
   buildManualTriggerMetadataNode,
   WORKFLOW_TRIGGER_METADATA_KEY,
   WORKFLOW_TRIGGER_PAYLOAD_KEY,
-  WORKFLOW_TRIGGER_PAYLOAD_LABEL,
+  WORKFLOW_TRIGGER_RECORD_LABEL,
+  WORKFLOW_TRIGGER_RECORDS_LABEL,
 } from 'twenty-shared/workflow';
 import { DatabaseEventAction } from '~/generated-metadata/graphql';
 
@@ -130,7 +131,7 @@ export const computeStepOutputSchema = ({
             [WORKFLOW_TRIGGER_PAYLOAD_KEY]: {
               isLeaf: false,
               icon: objectMetadataItem.icon ?? undefined,
-              label: WORKFLOW_TRIGGER_PAYLOAD_LABEL,
+              label: WORKFLOW_TRIGGER_RECORD_LABEL,
               value: generateRecordOutputSchema(objectMetadataItem),
             },
             [WORKFLOW_TRIGGER_METADATA_KEY]: buildManualTriggerMetadataNode(),
@@ -142,7 +143,7 @@ export const computeStepOutputSchema = ({
           [WORKFLOW_TRIGGER_PAYLOAD_KEY]: {
             isLeaf: false,
             type: 'object',
-            label: WORKFLOW_TRIGGER_PAYLOAD_LABEL,
+            label: WORKFLOW_TRIGGER_RECORDS_LABEL,
             value: {
               [objectMetadataItem.namePlural]: {
                 isLeaf: true,