docs(changelog): add hunting tournament entry to Unreleased

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Hunting Tournament system: all six tournament handlers are now fully implemented and DB-backed. `MsgMhfEnterTournamentQuest` (0x00D2) wire format was derived from `mhfo-hd.dll` binary analysis. Schedule, cups, sub-events, player registrations, and run submissions are stored in five new tables. `EnumerateRanking` returns the active tournament schedule with phase-state computation; `EnumerateOrder` returns per-event leaderboards ranked by submission time. `TournamentDefaults.sql` seeds cup and sub-event data from live tournament #150. One field (`Unk2` / event_id mapping) remains unconfirmed pending a packet capture ([#184](https://github.com/Mezeporta/Erupe/issues/184)). Database migration `0015_tournament` (`tournaments`, `tournament_cups`, `tournament_sub_events`, `tournament_entries`, `tournament_results`).
 - Return/Rookie Guild system: new players are automatically placed in a temporary rookie guild (`return_type=1`) and returning players in a comeback guild (`return_type=2`) via `MSG_MHF_ENTRY_ROOKIE_GUILD`. Players graduate (leave) via `OperateGuildGraduateRookie`/`OperateGuildGraduateReturn`. Guild info response now reports `isReturnGuild` correctly. Database migration `0014_return_guilds` adds `return_type` to the `guilds` table.
 - `saveutil` admin CLI (`cmd/saveutil/`): `import`, `export`, `grant-import`, and `revoke-import` commands for transferring character save data between server instances without touching the database manually.
 - `POST /v2/characters/{id}/import` API endpoint: player-facing save import gated behind a one-time admin-granted token (generated by `saveutil grant-import`). Token expires after a configurable TTL (default 24 h).