feat(server): convert view to overridable entity (#21436)

## Context

Every entity created as a side effect of object creation must support
the overridable pattern (`isActive` + `overrides` + override routing)
before we can re-own side effects to their true application. Starting
with View.

viewField, viewFieldGroup, pageLayoutTab and pageLayoutWidget already
extend `OverridableEntity`. This PR brings `view` to the same pattern.

## What this does

- `ViewEntity` now extends `OverridableEntity<ViewOverrides>` (adds
`isActive` boolean + `overrides` jsonb). All editable view properties
are overridable; the 3 fieldMetadata foreign keys are converted to/from
universal identifiers like viewField's `viewFieldGroupId`.
- **Update**: mutations on a view not owned by the caller (e.g. standard
views like "All Companies") are written into `overrides` instead of
mutating the row. Reads merge overrides in
the DTO.
- **Delete/destroy**: views not owned by the caller are deactivated
(`isActive = false`) instead of deleted.
~~- **INDEX invariant**: `key = INDEX` views can only be created via
object-creation side effect. The API now rejects creating, deleting or
destroying INDEX views (object-deletion cascade is unaffected). This was
not really needed for this migration but was flagged during
implementation.~~
- **Front**: views with `isActive = false` are filtered out of the views
selector.
- Fast instance command adds the two columns
(`2-12-instance-command-fast-...-view-overridable-entity.ts`).

## Notes

- Custom (caller-owned) views behave exactly as before: direct updates,
soft delete.
- View-group side effects (kanban groups) are computed on the
override-merged view so overridden `mainGroupByFieldMetadataId` works.

packages/twenty-server/src/engine/workspace-manager/workspace-migration/universal-flat-entity/constants/all-jsonb-properties-with-serialized-relation-by-metadata-name.constant.ts

@@ -12,7 +12,9 @@ export const ALL_JSONB_PROPERTIES_WITH_SERIALIZED_RELATION_BY_METADATA_NAME = {
     settings: 'settings',
   },
   objectMetadata: {},
-  view: {},
+  view: {
+    overrides: 'overrides',
+  },
   viewField: {
     overrides: 'overrides',
   },

packages/twenty-server/src/engine/workspace-manager/workspace-migration/universal-flat-entity/types/metadata-universal-flat-entity-properties-to-compare.type.ts

@@ -64,6 +64,8 @@ type Assertions = [
       | 'anyFieldFilterValue'
       | 'visibility'
       | 'createdByUserWorkspaceId'
+      | 'isActive'
+      | 'universalOverrides'
     >
   >,
 ];