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Extend new_definition to also create the pool's TWAP current-tick account via a chained CreateCurrentTickAccount, so a pool and its price feed are born together. The opening tick is derived on-chain from the pool's own reserves (reserve_b / reserve_a as Q64.64), not caller-supplied, so it cannot be forged. The pool is passed in its post-claim state and authorized as the price source via its pool PDA seed. Add spot_price_q64_64 to amm_core (not the oracle): the reserves -> price mapping is the price source's concern; the oracle only converts price to a tick.