Add local only cache to cache service and cache typeorm entity metadata (#16287)

## Problem

buildEntityMetadatas in GlobalWorkspaceOrmManager is computationally
expensive and was running on every executeInWorkspaceContext call. This
method uses
TypeORM's EntitySchemaTransformer and EntityMetadataBuilder to build
metadata for all workspace entities (30-50+ objects with many fields
each).

The resulting EntityMetadata[] is not serialisable which means it cannot
be cached in Redis because they contain:
- Circular references
- Functions/methods
- References to the DataSource instance

## Solution

Extended the workspace cache system to support local-only caching, then
created a cache provider for entityMetadatas.

## Implementation details
Updated @WorkspaceCache decorator (workspace-cache.decorator.ts)
- Added localOnly?: boolean option to skip Redis storage for
non-serializable data
Created WorkspaceEntityMetadatasCacheService
- Computes entity metadatas from DB to avoid race condition, this is
acceptable
Simplified GlobalWorkspaceOrmManager
- Now fetches entityMetadatas from cache instead of rebuilding on every
call
Updated Workspace migration runner - the only entry point where metadata
can change
- Now invalidate the new 'entityMetadata' local cache when
shouldIncrementMetadataGraphqlSchemaVersion is true (== field/object
mutations)

packages/twenty-server/src/engine/core-modules/api-key/services/api-key-role.service.ts

@@ -1,6 +1,7 @@
 import { Injectable } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 
+import { isDefined } from 'twenty-shared/utils';
 import { In, IsNull, Not, Repository } from 'typeorm';
 
 import { ApiKeyEntity } from 'src/engine/core-modules/api-key/api-key.entity';
@@ -69,7 +70,7 @@ export class ApiKeyRoleService {
 
     const roleId = apiKeyRoleMap[apiKeyId];
 
-    if (!roleId) {
+    if (!isDefined(roleId)) {
       throw new ApiKeyException(
         `API key ${apiKeyId} has no role assigned`,
         ApiKeyExceptionCode.API_KEY_NO_ROLE_ASSIGNED,