Create DAO Payment on mainnet

[0xDanko]

This PR creates 1 payment from the DAO multisig on mainnet. Payment 1: 450800 USDC to 0x3B8910...
https://forum.balancer.fi/t/bip-918-operational-restructuring-for-balancer/7000

[github-actions]

FILENAME: BIPs/2026-W38/payment-2026-09-09_1126.json
COMMIT: e3fe7082c16799a791019ebf586b9cd2c2097d6a

Validator	Result
validate_contains_msig	✅
validate_msig_in_address_book	✅
validate_chain_specified	✅
validate_file_has_bip	❌ (No BIP number found in file path BIPs/2026-W38/payment-2026-09-09_1126.json)
validate_path_has_weekly_dir	✅

[github-actions]

FILENAME: BIPs/2026-W38/payment-2026-09-09_1126.json
MULTISIG: multisigs/treasury (mainnet:0x0EFcCBb9E2C09Ea29551879bd9Da32362b32fc89)
COMMIT: e3fe7082c16799a791019ebf586b9cd2c2097d6a
CHAIN(S): mainnet
TENDERLY: 🟩 SUCCESS

+----------+-------------------------------------------------+----------------------------------------------------------------------+------------------------------+-----+----------+
| function | token_symbol                                    | recipient                                                            | amount                       | bip | tx_index |
+----------+-------------------------------------------------+----------------------------------------------------------------------+------------------------------+-----+----------+
| transfer | USDC:0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 | multisigs/foundation_opco:0x3B8910F378034FD6E103Df958863e5c684072693 | 450800.0 (RAW: 450800000000) | N/A |    0     |
+----------+-------------------------------------------------+----------------------------------------------------------------------+------------------------------+-----+----------+