Add billing meter event service (#9865)

Solves :
https://github.com/twentyhq/private-issues/issues/241
https://github.com/twentyhq/private-issues/issues/254

**TLDR:**

- Add BillingMeterEventService and StripeBillingMeterEventService in
order to send billing meter events to stripe.
- Plugged the service into workflow node execution for testing purposes
(more improvements on this area will be done in the next PR's)

**In order to test:**

- Have the environment variable IS_BILLING_ENABLED set to true and add
the other required environment variables for Billing to work
- Do a database reset (to ensure that the new feature flag is properly
added and that the billing tables are created)
- Run the command: npx nx run twenty-server:command
billing:sync-plans-data (if you don't do that the products and prices
will not be present in the database)
- Run the server , the frontend, the worker, and the stripe listen
command (stripe listen --forward-to
http://localhost:3000/billing/webhooks)
- Buy a subscription for the Acme workspace 
- Create a workflow and run it
- After the run has been finished check in sprite the quantity of events
in the CreditMeter, you should see that there is a new occurence with
value one.

**Take into consideration:**

- I used an eventName that I have made a long time ago, so it hasn't a
significant naming. I'm updating the meters and associated prices in
stripe to use the correct meter with a more clearer eventName.
- I put some error handling in the execution of the workflow nodes, this
is still incomplete and needs some refinement, I would like the feedback
of the workflows track for a more cleaner approach

packages/twenty-server/src/modules/workflow/workflow-runner/workflow-runner.module.ts

@@ -1,5 +1,6 @@
 import { Module } from '@nestjs/common';
 
+import { BillingModule } from 'src/engine/core-modules/billing/billing.module';
 import { ThrottlerModule } from 'src/engine/core-modules/throttler/throttler.module';
 import { WorkflowCommonModule } from 'src/modules/workflow/common/workflow-common.module';
 import { WorkflowExecutorModule } from 'src/modules/workflow/workflow-executor/workflow-executor.module';
@@ -8,7 +9,12 @@ import { WorkflowRunWorkspaceService } from 'src/modules/workflow/workflow-runne
 import { WorkflowRunnerWorkspaceService } from 'src/modules/workflow/workflow-runner/workspace-services/workflow-runner.workspace-service';
 
 @Module({
-  imports: [WorkflowCommonModule, WorkflowExecutorModule, ThrottlerModule],
+  imports: [
+    WorkflowCommonModule,
+    WorkflowExecutorModule,
+    ThrottlerModule,
+    BillingModule,
+  ],
   providers: [
     WorkflowRunnerWorkspaceService,
     WorkflowRunWorkspaceService,

packages/twenty-server/src/modules/workflow/workflow-runner/workspace-services/workflow-runner.workspace-service.ts

@@ -1,5 +1,6 @@
-import { Injectable } from '@nestjs/common';
+import { Injectable, Logger } from '@nestjs/common';
 
+import { BillingUsageService } from 'src/engine/core-modules/billing/services/billing-usage.service';
 import { InjectMessageQueue } from 'src/engine/core-modules/message-queue/decorators/message-queue.decorator';
 import { MessageQueue } from 'src/engine/core-modules/message-queue/message-queue.constants';
 import { MessageQueueService } from 'src/engine/core-modules/message-queue/services/message-queue.service';
@@ -12,10 +13,12 @@ import { WorkflowRunWorkspaceService } from 'src/modules/workflow/workflow-runne
 
 @Injectable()
 export class WorkflowRunnerWorkspaceService {
+  private readonly logger = new Logger(WorkflowRunnerWorkspaceService.name);
   constructor(
     private readonly workflowRunWorkspaceService: WorkflowRunWorkspaceService,
     @InjectMessageQueue(MessageQueue.workflowQueue)
     private readonly messageQueueService: MessageQueueService,
+    private readonly billingUsageService: BillingUsageService,
   ) {}
 
   async run(
@@ -24,6 +27,14 @@ export class WorkflowRunnerWorkspaceService {
     payload: object,
     source: ActorMetadata,
   ) {
+    const canExecuteBilledFunction =
+      await this.billingUsageService.canExecuteBilledFunction(workspaceId);
+
+    if (!canExecuteBilledFunction) {
+      this.logger.log(
+        'Cannot execute billed function, there is no subscription for this workspace',
+      );
+    }
     const workflowRunId =
       await this.workflowRunWorkspaceService.createWorkflowRun(
         workflowVersionId,