fix(execution): drop the unreachable billing-account admission code

A workspace without a billing account fails inside payer resolution and takes
the retryable attribution-error path; the branch that tagged
BILLING_ACCOUNT_REQUIRED only ran for an attribution with no actor, which
system attribution never produces. The branch goes back to its staging form
and the deterministic set keeps the usage limit and suspended accounts.

Author: waleedlatif1

apps/sim/lib/core/admission/rejection.ts

@@ -11,7 +11,6 @@
 export const ADMISSION_REJECTION_CODE = {
   USAGE_LIMIT_EXCEEDED: 'USAGE_LIMIT_EXCEEDED',
   ACCOUNT_SUSPENDED: 'ACCOUNT_SUSPENDED',
-  BILLING_ACCOUNT_REQUIRED: 'BILLING_ACCOUNT_REQUIRED',
 } as const
 
 const DETERMINISTIC_ADMISSION_REJECTION_CODES: ReadonlySet<string> = new Set(

apps/sim/lib/execution/preprocessing.test.ts

@@ -1023,16 +1023,6 @@ describe('preprocessExecution admission rejection codes and blocked-run log thro
       arrange: () => mockGetActivelyBannedUserIds.mockResolvedValue(['billed-account-1']),
       expected: { statusCode: 403, code: ADMISSION_REJECTION_CODE.ACCOUNT_SUSPENDED },
     },
-    {
-      gate: 'billing account',
-      arrange: () =>
-        mockResolveSystemBillingAttribution.mockImplementation((workspaceId: string) => ({
-          ...ORGANIZATION_ATTRIBUTION,
-          actorUserId: '',
-          workspaceId,
-        })),
-      expected: { statusCode: 500, code: ADMISSION_REJECTION_CODE.BILLING_ACCOUNT_REQUIRED },
-    },
   ])('tags a $gate refusal with its stable code', async ({ arrange, expected }) => {
     arrange()
     const result = await refuse('workflow-1')

apps/sim/lib/execution/preprocessing.ts

@@ -579,12 +579,7 @@ export async function preprocessExecution(
         workspaceId,
       })
 
-      const failure: PreprocessExecutionError = {
-        message: 'Unable to resolve billing account',
-        statusCode: 500,
-        code: ADMISSION_REJECTION_CODE.BILLING_ACCOUNT_REQUIRED,
-      }
-      await recordGateFailure(failure, {
+      await recordPreprocessingError({
         workflowId,
         executionId,
         triggerType,
@@ -596,7 +591,13 @@ export async function preprocessExecution(
         triggerData,
       })
 
-      return { success: false, error: failure }
+      return {
+        success: false,
+        error: {
+          message: 'Unable to resolve billing account',
+          statusCode: 500,
+        },
+      }
     }
 
     if (!billingAttribution) {

apps/sim/lib/webhooks/polling/admission-refusals.ts

@@ -7,8 +7,8 @@ const logger = createLogger('PollAdmissionRefusals')
 
 /**
  * How long a workspace's polls are skipped after execution admission refused a
- * polled event for a reason that holds until a person acts (usage limit,
- * suspended account, missing billing account). Polling resumes on its own after
+ * polled event for a reason that holds until a person acts (usage limit or a
+ * suspended account). Polling resumes on its own after
  * this window, so a raised limit takes effect within it.
  */
 const POLL_ADMISSION_REFUSAL_TTL_SECONDS = 5 * 60