OpCo payment for Q1/2026 mainnet

[0xDanko]

This PR creates 1 payment from the DAO multisig on mainnet. Payment 1: 819273 USDC to 0x3B8910...
source: https://forum.balancer.fi/t/bip-873-balancer-ecosystem-roadmap-proposal-and-funding/6668

[github-actions]

FILENAME: BIPs/2026-W10/payment-2026-02-24_1713.json
COMMIT: f0e0f2577103a1df2361d4a4f2d67c8bcc5f3c1b

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-W10/payment-2026-02-24_1713.json)
validate_path_has_weekly_dir	✅

[github-actions]

FILENAME: BIPs/2026-W10/payment-2026-02-24_1713.json
MULTISIG: multisigs/treasury (mainnet:0x0EFcCBb9E2C09Ea29551879bd9Da32362b32fc89)
COMMIT: f0e0f2577103a1df2361d4a4f2d67c8bcc5f3c1b
CHAIN(S): mainnet
TENDERLY: 🟩 SUCCESS

+----------+-------------------------------------------------+----------------------------------------------------------------------+------------------------------+-----+----------+
| function | token_symbol                                    | recipient                                                            | amount                       | bip | tx_index |
+----------+-------------------------------------------------+----------------------------------------------------------------------+------------------------------+-----+----------+
| transfer | USDC:0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 | multisigs/foundation_opco:0x3B8910F378034FD6E103Df958863e5c684072693 | 819273.0 (RAW: 819273000000) | N/A |    0     |
+----------+-------------------------------------------------+----------------------------------------------------------------------+------------------------------+-----+----------+

[Xeonus]

Target correct. Amount as needed per quarterly budget delta