fix(client): resolve closed markets for redeem

[cesarenaldi]

Summary

• Resolve market context for redeem calls with closed markets included.
• Keep split and merge market lookups unchanged.
• Update sync and async redeem workflow tests to assert closed-market lookup behavior.

Verification

• uv run ruff format --check .
• uv run ruff check .
• uv run pyright
• uv run pytest tests/unit/test_relayer_redeem_positions.py tests/unit/test_sync_relayer_workflows.py tests/unit/test_relayer_position_workflows.py -q
• uv run pytest -q -m "not integration"

Notes

• Full uv run pytest completed with one unrelated live sports stream integration failure: tests/integration/test_sports_stream.py::test_live_sports_stream_survives_past_heartbeat_stale_window.

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Note

Medium Risk
Changes on-chain redeem transaction routing (adapter selection) for resolved markets; wrong lookup could still submit redeem to the wrong contract, but scope is narrow and covered by updated unit tests.

Overview
Market redeems now resolve Gamma market metadata with closed=True on list_markets, so settled markets are found instead of failing lookup when only open markets are returned by default.

_resolve_market_position_context gains an optional closed flag (async and sync secure clients) and forwards it to list_markets when set. Only redeem_positions passes closed=True; split, merge, and batch merge paths are unchanged.

Unit tests for async and sync redeem workflows were updated to expect closed: True in market lookup kwargs.

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