Implements three join-path state machine endpoints:
- /guild/join: FREE (instant), APPROVAL (pending row + idempotent re-apply),
ONLY_INVITE (pending invite required); CommitJoin consumes invites + cancels
join requests; MaxMemberNum cap enforced.
- /guild/cancel_join_request: cancels all pending requests for caller (no
request_id on wire per GuildJoinRequestCancelTask decompile, composite PK kept).
- /guild/join_request_list: leader/subleader sees pending applicants with
viewer profile (name/emblem/degree/request_time unix secs).
IGuildService.CancelJoinRequestAsync signature changed from (viewerId, guildId)
to (viewerId) since the client sends no guildId. GuildJoinRequestEntry enriched
record added to GuildServiceTypes. Re-apply after cancel resets existing row
in-place to avoid composite-PK conflict. 11 integration tests, all green.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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