Add a limit to workflow queue per workspace (#12908)

- new status `ENQUEUED` added. With a command to backfill
- counter in cache per workspace, managed by a new service
[workflow-run-queue.workspace-service.ts](https://github.com/twentyhq/twenty/compare/tt-improve-workflow-run-queueing?expand=1#diff-1e2de2a48cd482a3bd7e8dedf1150a19d0b200afbd9282181a24ecddddb56927)
- cron added that will run every minute to look for not started
workflows

Here is the new flow:
- When executing a workflow, we check if the queue is not full. If not,
run is created as `ENQUEUED` and the run workflow job is triggered as
usual. If full, create the run as NOT_STARTED and do not trigger the job
- Cron will look for NOT_STARTED workflows and queue some if there is
some place again
- Only MANUAL and Form submit skip the queue limit

packages/twenty-server/src/engine/core-modules/cache-storage/types/cache-storage-namespace.enum.ts

@@ -1,6 +1,7 @@
 export enum CacheStorageNamespace {
   ModuleMessaging = 'module:messaging',
   ModuleCalendar = 'module:calendar',
+  ModuleWorkflow = 'module:workflow',
   EngineWorkspace = 'engine:workspace',
   EngineHealth = 'engine:health',
 }

packages/twenty-server/src/engine/core-modules/metrics/types/metrics-keys.type.ts

@@ -20,4 +20,5 @@ export enum MetricsKeys {
   WorkflowRunCompleted = 'workflow-run/completed',
   WorkflowRunFailed = 'workflow-run/failed',
   WorkflowRunFailedThrottled = 'workflow-run/failed/throttled',
+  WorkflowRunFailedToEnqueue = 'workflow-run/failed/to-enqueue',
 }

packages/twenty-server/src/engine/core-modules/throttler/throttler.exception.ts

@@ -7,5 +7,5 @@ export class ThrottlerException extends CustomException {
 }
 
 export enum ThrottlerExceptionCode {
-  TOO_MANY_REQUESTS = 'TOO_MANY_REQUESTS',
+  LIMIT_REACHED = 'LIMIT_REACHED',
 }

packages/twenty-server/src/engine/core-modules/throttler/throttler.service.ts

@@ -20,8 +20,8 @@ export class ThrottlerService {
 
     if (currentCount >= limit) {
       throw new ThrottlerException(
-        'Too many requests',
-        ThrottlerExceptionCode.TOO_MANY_REQUESTS,
+        'Limit reached',
+        ThrottlerExceptionCode.LIMIT_REACHED,
       );
     }