fix(server): index page-layout FKs to fix workspace cleanup timeout (#23289)

The cleanSuspendedWorkspacesJob cron timed out every run (Sentry monitor
"a timeout check-in was detected"): hard-deleting soft-deleted
workspaces hung on `DELETE FROM core.pageLayout`, hit the 10s query
timeout, rolled back, so those workspaces were never destroyed and got
retried hourly.

Root cause: the FKs in the pageLayout -> pageLayoutTab ->
pageLayoutWidget tree had no usable index on the referencing column. The
existing indexes lead with workspaceId and are partial ("deletedAt" IS
NULL), so ON DELETE CASCADE / SET NULL fell back to full sequential
scans of the shared core tables per deleted row; on layout-heavy
workspaces this exceeded 10s.

- Add non-partial FK-column indexes on pageLayoutTab(pageLayoutId) and
pageLayoutWidget(pageLayoutTabId)

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packages/twenty-server/src/database/commands/upgrade-version-command/instance-commands.constant.ts

@@ -124,6 +124,7 @@ import { AddStatusesToBillingSubscriptionIndexSlowInstanceCommand } from './2-23
 import { AddOnConnectLogicFunctionToConnectionProviderFastInstanceCommand } from './2-24/2-24-instance-command-fast-1784712843602-add-on-connect-logic-function-to-connection-provider';
 import { RepairKeyValuePairApplicationIdFastInstanceCommand } from './2-24/2-24-instance-command-fast-1784897347051-repair-key-value-pair-application-id';
 import { AddAgentForeignKeyToRoleTargetFastInstanceCommand } from './2-25/2-25-instance-command-fast-1784820332810-add-agent-foreign-key-to-role-target';
+import { AddPageLayoutCascadeDeleteIndexesFastInstanceCommand } from './2-25/2-25-instance-command-fast-1784904030251-add-page-layout-cascade-delete-indexes';
 
 export const INSTANCE_COMMANDS = [
   AddViewFieldGroupIdIndexOnViewFieldFastInstanceCommand,
@@ -250,4 +251,5 @@ export const INSTANCE_COMMANDS = [
   AddOnConnectLogicFunctionToConnectionProviderFastInstanceCommand,
   RepairKeyValuePairApplicationIdFastInstanceCommand,
   AddAgentForeignKeyToRoleTargetFastInstanceCommand,
+  AddPageLayoutCascadeDeleteIndexesFastInstanceCommand,
 ];