Ws poc (#11293)

related to https://github.com/twentyhq/core-team-issues/issues/601

## Done
- add a `onDbEvent` `Subscription` graphql endpoint to listen to
database_event using what we have done with webhooks:
- you can subscribe to any `action` (created, updated, ...) for any
`objectNameSingular` or a specific `recordId`. Parameters are nullable
and treated as wildcards when null.
  - returns events with following shape
```typescript
  @Field(() => String)
  eventId: string;

  @Field()
  emittedAt: string;

  @Field(() => DatabaseEventAction)
  action: DatabaseEventAction;

  @Field(() => String)
  objectNameSingular: string;

  @Field(() => GraphQLJSON)
  record: ObjectRecord;

  @Field(() => [String], { nullable: true })
  updatedFields?: string[];
```
- front provide a componentEffect `<ListenRecordUpdatesEffect />` that
listen for an `objectNameSingular`, a `recordId` and a list of
`listenedFields`. It subscribes to record updates and updates its apollo
cached value for specified `listenedFields`
- subscription is protected with credentials

## Result

Here is an application with `workflowRun`


https://github.com/user-attachments/assets/c964d857-3b54-495f-bf14-587ba26c5a8c

---------

Co-authored-by: prastoin <paul@twenty.com>

packages/twenty-server/src/engine/subscriptions/subscriptions.resolver.ts

@@ -0,0 +1,43 @@
+import { Args, Resolver, Subscription } from '@nestjs/graphql';
+import { Inject, UseGuards } from '@nestjs/common';
+
+import { RedisPubSub } from 'graphql-redis-subscriptions';
+import { isDefined } from 'twenty-shared/utils';
+
+import { OnDbEventDTO } from 'src/engine/subscriptions/dtos/on-db-event.dto';
+import { OnDbEventInput } from 'src/engine/subscriptions/dtos/on-db-event.input';
+import { WorkspaceAuthGuard } from 'src/engine/guards/workspace-auth.guard';
+import { UserAuthGuard } from 'src/engine/guards/user-auth.guard';
+
+@Resolver()
+@UseGuards(WorkspaceAuthGuard, UserAuthGuard)
+export class SubscriptionsResolver {
+  constructor(@Inject('PUB_SUB') private readonly pubSub: RedisPubSub) {}
+
+  @Subscription(() => OnDbEventDTO, {
+    filter: (
+      payload: { onDbEvent: OnDbEventDTO },
+      variables: { input: OnDbEventInput },
+    ) => {
+      const isActionMatching =
+        !isDefined(variables.input.action) ||
+        payload.onDbEvent.action === variables.input.action;
+
+      const isObjectNameSingularMatching =
+        !isDefined(variables.input.objectNameSingular) ||
+        payload.onDbEvent.objectNameSingular ===
+          variables.input.objectNameSingular;
+
+      const isRecordIdMatching =
+        !isDefined(variables.input.recordId) ||
+        payload.onDbEvent.record.id === variables.input.recordId;
+
+      return (
+        isActionMatching && isObjectNameSingularMatching && isRecordIdMatching
+      );
+    },
+  })
+  onDbEvent(@Args('input') _: OnDbEventInput) {
+    return this.pubSub.asyncIterator('onDbEvent');
+  }
+}