fix(namespaces): fix member count

[ycdzj]

No description provided.

[Copilot]

Pull Request Overview

This PR adds functionality to count the number of members in a namespace. The implementation introduces a new API endpoint and service method to return the member count for a given namespace.

Key changes:

• Added a countMembers service method that queries the database for namespace member count
• Added a corresponding GET endpoint at /:namespaceId/members/count to expose this functionality

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/namespaces/namespaces.service.ts	Added countMembers method to query member count by namespace ID
src/namespaces/namespaces.controller.ts	Added countMembers endpoint to expose member count functionality via API

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