feat(server): support query overcapacity member count of workspace (#12050)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

- **New Features**
  - Workspace quota information now includes a new metric: the count of members exceeding seat capacity ("overcapacityMemberCount"), available in both numeric and human-readable formats.
  - The workspace quota display and related queries have been updated to show this new overcapacity member count alongside existing quota metrics.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/common/graphql/src/graphql/index.ts

@@ -1821,12 +1821,15 @@ export const workspaceQuotaQuery = {
       historyPeriod
       memberLimit
       memberCount
+      overcapacityMemberCount
       humanReadable {
         name
         blobLimit
         storageQuota
         historyPeriod
         memberLimit
+        memberCount
+        overcapacityMemberCount
       }
     }
   }

packages/common/graphql/src/graphql/workspace-quota.gql

@@ -8,12 +8,15 @@ query workspaceQuota($id: String!) {
       historyPeriod
       memberLimit
       memberCount
+      overcapacityMemberCount
       humanReadable {
         name
         blobLimit
         storageQuota
         historyPeriod
         memberLimit
+        memberCount
+        overcapacityMemberCount
       }
     }
   }

packages/common/graphql/src/schema.ts

@@ -2310,6 +2310,7 @@ export interface WorkspaceQuotaHumanReadableType {
   memberCount: Scalars['String']['output'];
   memberLimit: Scalars['String']['output'];
   name: Scalars['String']['output'];
+  overcapacityMemberCount: Scalars['String']['output'];
   storageQuota: Scalars['String']['output'];
   storageQuotaUsed: Scalars['String']['output'];
 }
@@ -2322,6 +2323,7 @@ export interface WorkspaceQuotaType {
   memberCount: Scalars['Int']['output'];
   memberLimit: Scalars['Int']['output'];
   name: Scalars['String']['output'];
+  overcapacityMemberCount: Scalars['Int']['output'];
   storageQuota: Scalars['SafeInt']['output'];
   /** @deprecated use `usedStorageQuota` instead */
   usedSize: Scalars['SafeInt']['output'];
@@ -4498,6 +4500,7 @@ export type WorkspaceQuotaQuery = {
       historyPeriod: number;
       memberLimit: number;
       memberCount: number;
+      overcapacityMemberCount: number;
       humanReadable: {
         __typename?: 'WorkspaceQuotaHumanReadableType';
         name: string;
@@ -4505,6 +4508,8 @@ export type WorkspaceQuotaQuery = {
         storageQuota: string;
         historyPeriod: string;
         memberLimit: string;
+        memberCount: string;
+        overcapacityMemberCount: string;
       };
     };
   };