Migrate cron, databaseEventTrigger, httpRoute triggers to serverless functions (#17488)

## Summary

Migrates trigger entities (`CronTriggerEntity`,
`DatabaseEventTriggerEntity`, `RouteTriggerEntity`) into
`ServerlessFunctionEntity` by storing trigger settings as JSONB columns
directly on the serverless function. This simplifies the architecture
since these relationships were effectively one-to-one.

## Changes

### Schema Changes
- Added three new nullable JSONB columns to `ServerlessFunctionEntity`:
  - `cronTriggerSettings` - stores cron pattern
- `databaseEventTriggerSettings` - stores event name and updated fields
filter
- `httpRouteTriggerSettings` - stores path, HTTP method, auth
requirements, and forwarded headers

### Core Logic Updates
- `CronTriggerCronJob` - now queries `ServerlessFunctionEntity` directly
instead of `CronTriggerEntity`
- `CallDatabaseEventTriggerJobsJob` - now queries
`ServerlessFunctionEntity` directly
- `RouteTriggerService` - now queries `ServerlessFunctionEntity`
directly
- `ApplicationSyncService` - extracts trigger settings from manifest and
writes to serverless function

packages/twenty-server/src/modules/workflow/workflow-builder/workflow-version-step/__tests__/workflow-version-step-operations.workspace-service.spec.ts

@@ -260,9 +260,9 @@ describe('WorkflowVersionStepOperationsWorkspaceService', () => {
         serverlessFunctionLayerId: 'layer-id',
         universalIdentifier: 'universal-id',
         applicationId: 'application-id',
-        cronTriggerIds: [],
-        databaseEventTriggerIds: [],
-        routeTriggerIds: [],
+        cronTriggerSettings: null,
+        databaseEventTriggerSettings: null,
+        httpRouteTriggerSettings: null,
       };
 
       serverlessFunctionService.createOneServerlessFunction.mockResolvedValue(
@@ -340,9 +340,9 @@ describe('WorkflowVersionStepOperationsWorkspaceService', () => {
         serverlessFunctionLayerId: 'layer-id',
         universalIdentifier: 'universal-id',
         applicationId: 'application-id',
-        cronTriggerIds: [],
-        databaseEventTriggerIds: [],
-        routeTriggerIds: [],
+        cronTriggerSettings: null,
+        databaseEventTriggerSettings: null,
+        httpRouteTriggerSettings: null,
       };
 
       serverlessFunctionService.duplicateServerlessFunction.mockResolvedValue(