feat(polymarket): extend stateful replay and direct CLOB runtime

[taariq]

Closes #80

Summary

• move polymarket/maker-rebate-bot to an event-driven stateful replay with carried cash/inventory, order-book-aware fills, pessimistic spread-decay, and JSONL telemetry output
• extend that stateful replay framework to polymarket/paired-market-basis-maker, polymarket/liquidity-paired-basis-maker, and polymarket/high-throughput-paired-basis-maker through shared polymarket/_shared/pair_stateful_replay.py
• add paired-market fixture/live-book loading, --backtest-file support, replay telemetry output, and shared backtest parameters for order-book-aware fills and queue modeling
• keep Seren publisher guardrails for backtest/live market data while wiring live maker execution through the shared direct py-clob-client CLOB runtime

Validation

• pytest --import-mode=importlib polymarket/maker-rebate-bot/tests/test_smoke.py
• pytest --import-mode=importlib polymarket/paired-market-basis-maker/tests/test_smoke.py polymarket/liquidity-paired-basis-maker/tests/test_smoke.py polymarket/high-throughput-paired-basis-maker/tests/test_smoke.py
• python3 -m py_compile polymarket/_shared/polymarket_live.py polymarket/_shared/pair_stateful_replay.py polymarket/maker-rebate-bot/scripts/agent.py polymarket/liquidity-paired-basis-maker/scripts/agent.py polymarket/paired-market-basis-maker/scripts/agent.py polymarket/high-throughput-paired-basis-maker/scripts/agent.py

Notes

• pytest --import-mode=importlib is required here because sibling skill directories reuse the test_smoke.py module name, which causes default pytest collection collisions
• the earlier PR in serenorg/seren-skillforge was closed because SkillForge docs require publishing generated/runtime skill changes in serenorg/seren-skills