feat: sync API surface with asobi backend

[Taure]

Summary

• Added missing REST query params (matches, tournaments, notifications, inventory, matchmaker)
• Added missing group management endpoints (updateGroup, getGroupMembers, updateMemberRole, removeMember)
• Added DM endpoints (send, history) and Vote models
• Fixed WS vote message types (match.vote → vote.cast/vote.veto)
• Added missing WS methods (world.leave, world.input, dm.send) and streams (onWorldLeft, onWorldEvent, onDmMessage, onMatchEvent)
• Fixed inventory.consume and notifications.markRead return types

Test plan

• Run dart analyze — no errors
• Verify new API methods match backend controller signatures
• Verify WS message types match asobi_ws_handler.erl
• Test against running asobi backend