Gate export/import command menu items by permission flag (#19991)

## Summary
- Hides the `exportRecords`, `exportView`, and `importRecords` command
menu actions from
users whose role does not hold the matching `EXPORT_CSV` / `IMPORT_CSV`
permission flag.
- Exposes the current user's role permission flags to
`conditionalAvailabilityExpression`
by adding `permissionFlags: Record<string, boolean>` to
`CommandMenuContextApi`, mirroring
 how `featureFlags` is already accessible.
- Adds a `2.1.0` workspace upgrade command that rewrites the three
existing rows on every
 active/suspended workspace.

## Before
<img width="1294" height="287" alt="Screenshot 2026-04-22 at 19 37 40"
src="https://github.com/user-attachments/assets/11ca8635-14d7-40a0-9ca0-76329c54e3c6"
/>

## After
<img width="1283" height="285" alt="Screenshot 2026-04-22 at 19 32 25"
src="https://github.com/user-attachments/assets/5e49fa8a-4541-42ee-96da-4c1de7d00aae"
/>

packages/twenty-server/src/engine/workspace-manager/twenty-standard-application/constants/standard-command-menu-item.constant.ts

@@ -148,7 +148,7 @@ export const STANDARD_COMMAND_MENU_ITEMS = {
     position: 10,
     shortLabel: 'Export',
     availabilityType: CommandMenuItemAvailabilityType.RECORD_SELECTION,
-    conditionalAvailabilityExpression: null,
+    conditionalAvailabilityExpression: 'permissionFlags.EXPORT_CSV',
     availabilityObjectMetadataUniversalIdentifier: null,
     frontComponentUniversalIdentifier: null,
     engineComponentKey: EngineComponentKey.EXPORT_RECORDS,
@@ -192,7 +192,8 @@ export const STANDARD_COMMAND_MENU_ITEMS = {
     position: 13,
     shortLabel: 'Import',
     availabilityType: CommandMenuItemAvailabilityType.GLOBAL_OBJECT_CONTEXT,
-    conditionalAvailabilityExpression: 'not hasAnySoftDeleteFilterOnView',
+    conditionalAvailabilityExpression:
+      'not hasAnySoftDeleteFilterOnView and permissionFlags.IMPORT_CSV',
     availabilityObjectMetadataUniversalIdentifier: null,
     frontComponentUniversalIdentifier: null,
     engineComponentKey: EngineComponentKey.IMPORT_RECORDS,
@@ -206,7 +207,7 @@ export const STANDARD_COMMAND_MENU_ITEMS = {
     position: 14,
     shortLabel: 'Export',
     availabilityType: CommandMenuItemAvailabilityType.GLOBAL_OBJECT_CONTEXT,
-    conditionalAvailabilityExpression: null,
+    conditionalAvailabilityExpression: 'permissionFlags.EXPORT_CSV',
     availabilityObjectMetadataUniversalIdentifier: null,
     frontComponentUniversalIdentifier: null,
     engineComponentKey: EngineComponentKey.EXPORT_VIEW,