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/metadata-modules/flat-entity/constant/__tests__/__snapshots__/all-universal-flat-entity-properties-to-compare-and-stringify.constant.spec.ts.snap

@@ -327,8 +327,12 @@ exports[`ALL_UNIVERSAL_FLAT_ENTITY_PROPERTIES_TO_COMPARE_AND_STRINGIFY should ma
       "visibility",
       "mainGroupByFieldMetadataUniversalIdentifier",
       "shouldHideEmptyGroups",
+      "isActive",
+      "universalOverrides",
+    ],
+    "propertiesToStringify": [
+      "universalOverrides",
     ],
-    "propertiesToStringify": [],
   },
   "viewField": {
     "propertiesToCompare": [

packages/twenty-server/src/engine/metadata-modules/flat-entity/constant/all-entity-properties-configuration-by-metadata-name.constant.ts

@@ -271,64 +271,101 @@ export const ALL_ENTITY_PROPERTIES_CONFIGURATION_BY_METADATA_NAME = {
       toStringify: false,
       universalProperty: undefined,
     },
-    name: { toCompare: true, toStringify: false, universalProperty: undefined },
-    type: { toCompare: true, toStringify: false, universalProperty: undefined },
-    icon: { toCompare: true, toStringify: false, universalProperty: undefined },
+    name: {
+      toCompare: true,
+      toStringify: false,
+      universalProperty: undefined,
+      isOverridable: true,
+    },
+    type: {
+      toCompare: true,
+      toStringify: false,
+      universalProperty: undefined,
+      isOverridable: true,
+    },
+    icon: {
+      toCompare: true,
+      toStringify: false,
+      universalProperty: undefined,
+      isOverridable: true,
+    },
     position: {
       toCompare: true,
       toStringify: false,
       universalProperty: undefined,
+      isOverridable: true,
     },
     isCompact: {
       toCompare: true,
       toStringify: false,
       universalProperty: undefined,
+      isOverridable: true,
     },
     openRecordIn: {
       toCompare: true,
       toStringify: false,
       universalProperty: undefined,
+      isOverridable: true,
     },
     kanbanAggregateOperation: {
       toCompare: true,
       toStringify: false,
       universalProperty: undefined,
+      isOverridable: true,
     },
     kanbanAggregateOperationFieldMetadataId: {
       toCompare: true,
       toStringify: false,
       universalProperty:
         'kanbanAggregateOperationFieldMetadataUniversalIdentifier',
+      isOverridable: true,
     },
     anyFieldFilterValue: {
       toCompare: true,
       toStringify: false,
       universalProperty: undefined,
+      isOverridable: true,
     },
     calendarLayout: {
       toCompare: true,
       toStringify: false,
       universalProperty: undefined,
+      isOverridable: true,
     },
     calendarFieldMetadataId: {
       toCompare: true,
       toStringify: false,
       universalProperty: 'calendarFieldMetadataUniversalIdentifier',
+      isOverridable: true,
     },
     visibility: {
       toCompare: true,
       toStringify: false,
       universalProperty: undefined,
+      isOverridable: true,
     },
     mainGroupByFieldMetadataId: {
       toCompare: true,
       toStringify: false,
       universalProperty: 'mainGroupByFieldMetadataUniversalIdentifier',
+      isOverridable: true,
     },
     shouldHideEmptyGroups: {
       toCompare: true,
       toStringify: false,
       universalProperty: undefined,
+      isOverridable: true,
+    },
+    isActive: {
+      toCompare: true,
+      toStringify: false,
+      universalProperty: undefined,
+      isOverridable: false,
+    },
+    overrides: {
+      toCompare: true,
+      toStringify: true,
+      universalProperty: 'universalOverrides',
     },
     objectMetadataId: {
       toCompare: false,