Token state machine

A token moves through these states. Transitions are atomic and one-way (except QUEUE → INIT on unlock).

State	Trading?	Mint?	Transfers?
`NONE`	❌ revert	n/a	n/a
`INIT`	✅	✅ (hook only)	✅
`QUEUE`	❌ frozen	✅	only via hook
`WARMUP`	❌ frozen	✅	only via hook
`BATTLE`	✅ (score active)	✅	✅
`RESTING`	✅ (score frozen)	✅	✅
`ELIMINATED`	❌	❌	only via hook (burn-to-claim)
`GRADUATED`	✅	❌ disabled forever	✅
`LOST`	❌	❌	only via hook (burn-to-claim)

Lifecycle