Group Bridgers/Metapath under swft, add ChangeNOW treasuries, split TAC bridge contracts - #935

Label fixes so bridge dashboards can tell user flows apart from operator rebalancing.

Bridgers + Metapath → organization: swft

• From Apr to Sep 2026, the Metapath wallet EQDOPm18wZzLBbhwkR04A2ogbIJr7lZnuC2F8VW1N6wORSXV received withdrawals from a Binance hot wallet and passed them to the Bridgers main contract EQCqTuPS-cMN9SSRhaFrwJOGL7dKkFF8C0a05g2WzI9uRJ19, net $2.5–5.5M per month. It makes no payouts to users.
• The metapath.me front-end lists SWFT and Bridgers as its cross-chain routes.
• Both labels keep their own names and now share one organization, so transfers between them count as internal.

ChangeNOW: two operational wallets added

• EQDhOoMDKusXdWOVXtMr2F9wq65Xu3ijAN9_ph3hy3Z6vhhZ is a treasury of ~100k TON. It transfers only to and from the ChangeNOW hot wallet.
• EQAaknWdbM45CoRDnaT_7aCH-y_X_FBzMeoVLi3WSXfQAJF3 is a rebalancer. It tops up the hot wallet and forwards funds to an exchange deposit.

TAC: bridge contracts moved to bridge/tac_bridge.json (organization: tac)

• TAC is a separate EVM chain. The moved contracts are CCL, JettonProxy, NFT Proxy, the cross-chain assets handler and Retranslator 1. NFT, token, airdrop and settings addresses stay in infrastructure/tac.json.
• Retranslator 2 EQDYYA3699xsLF9y5dGbWL7KoXdoaTjOh7kyhPG_MELU3xa5 stays in infrastructure. On-chain it is a highload wallet that moves USDT between Bitfinex and the LayerZero "Liquidity rebalance" wallet. In Sep 2026 it had no TAC contract activity. Its source field records this behaviour.

python3 build_assets.py passes.