v0.1.13

feat: use Multicall3 discovery for periodic MM claims (#27)

Replace the session-only claim loop with claim_all_winnings() which uses
Multicall3 batched on-chain reads to discover ALL claimable positions —
not just markets traded in the current session.

This ensures the market maker recycles liquidity from:
- Previous sessions that were restarted
- Positions from manual trades or other tools
- Any resolved markets the old tracker missed

Runs every 5 minutes (vs 2 min before) since discovery scans all markets.
Initial 60s delay to let markets initialize first.