fix: add namespace_id filter to app_auth selectByCondition (#6828)

[zhang-arvin]

Fixes #6828

[Aias00]

Summary

Adds a namespace_id filter to the app_auth selectByCondition query, continuing the namespace-isolation hardening series (see #7001, #7007, #7003, #6999). When condition.namespaceId is provided, the query restricts results to that namespace.

Verification

• AppAuthQuery has a namespaceId field with getter/setter (verified on master), so condition.namespaceId in the mapper resolves correctly.
• This is a pure additive <if> condition in app-auth-sqlmap.xml; it does not change any method signature and has no callers to update.
• Consistent with the existing pattern used for selector/plugin/discovery queries.

Conclusion

Minimal, well-scoped SQL change consistent with the surrounding namespace-isolation work. Approve.