fix: add withDeleted option when looking up workflow version to copy

https://sonarly.com/issue/6076?type=bug

The `createDraftFromWorkflowVersion` mutation fails with NOT_FOUND when the referenced `workflowVersionIdToCopy` has been soft-deleted (workflow was deleted then the page still held a stale reference) or when the version ID simply doesn't belong to the given workflow.

Fix: Added `withDeleted: true` to both `findOne` calls that look up the source workflow version in `createDraftFromWorkflowVersion` and `duplicateWorkflow` methods.

**Why:** TypeORM's soft-delete mechanism (via the `deleteDate` column on `deletedAt`) causes `findOne` to automatically exclude records where `deletedAt IS NOT NULL`. When a workflow is deleted, all its versions are soft-deleted via `workflowVersionRepository.softDelete({ workflowId })` in `workflow-common.workspace-service.ts`. If the frontend still holds a cached reference to a soft-deleted version ID (stale Apollo cache, browser tab left open), the `createDraftFromWorkflowVersion` mutation fails with NOT_FOUND.

**What changed:** Both source version lookups now include `withDeleted: true`, which is the same pattern already used in `workflow-common.workspace-service.ts` (lines 274, 298, 388) for similar workflow version queries. Since these are read-only lookups that copy trigger/steps data into a new draft, including soft-deleted versions is safe and correct — we never write back to the soft-deleted record.

packages/twenty-server/src/modules/workflow/workflow-builder/workflow-version/workflow-version.workspace-service.ts

@@ -65,6 +65,7 @@ export class WorkflowVersionWorkspaceService {
             id: workflowVersionIdToCopy,
             workflowId,
           },
+          withDeleted: true,
         });
 
         if (!isDefined(workflowVersionToCopy)) {
@@ -196,6 +197,7 @@ export class WorkflowVersionWorkspaceService {
             id: workflowVersionIdToCopy,
             workflowId: workflowIdToDuplicate,
           },
+          withDeleted: true,
         });
 
         if (!isDefined(sourceVersion)) {