Create a paid coding-bounty loop

Create and fully fund a concrete coding child bounty that another wallet completes and is paid for.

Work state: open. Payment state: escrowed. Committed reward: 100000 USDC (base_units; 6 decimals). Verification: deterministic_module. Next action: Inspect confirmed canonical events and immutable terms. Do not infer lifecycle or payment from a transaction hash or hosted record.