feat(space): manager member search by username/email/phone

[an9xyz]

Problem

The admin member list endpoint GET /v1/manager/spaces/:space_id/members only matches the keyword query param against user.name and space_member.uid. SSO / email-login users often have an empty name, so admins cannot locate them.

Proposal

Extend the keyword filter to also cover user.username, user.email and user.phone, so members can be searched by username, email, phone, nickname, or UID. Keep list and count queries on the same filter; keep wildcard escaping.

Notes

Implemented in PR #200. Issue filed retroactively to attach the work to Sprint W22 (workflow order was reversed — PR opened before the tracking issue).

[github-actions]

Thanks for the feature request! 🐙

We've received your suggestion and will evaluate it for our roadmap.

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— Octo Team 🐙

[an9xyz]

Done — implemented and merged via #200 (squash commit 85787ab).