feat: v2 partnerid changes

[twx-virtuals]

Note

High Risk
Changes on-chain fund distribution after tax swaps; misconfiguration or a zero partner recipient could misroute asset token payouts.

Overview
AgentTaxV2 now supports partner / referrer fee splits on tax swaps. Admins map a bytes32 partnerId to a payout address and, per agent token, set partnerId plus partnerFeeRate (basis points). After a successful swap, post-swap asset is split among protocol (feeRate), partner, and creator (remainder), with transfers and PartnerFeeDistributed events.

New admin entry points: setPartnerRecipient, setTokenPartnerConfig (requires recipient when rate > 0; enforces feeRate + partnerFeeRate ≤ 10000), and updateFeeSplit for the global protocol rate. A view getTokenPartnerConfig exposes per-token partner settings.

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