Fix field evaluation for live OHLCV bars

[Mopati123]

Summary

• Allows the field Hamiltonian tensor to consume live canonical OHLCV bar lists as well as historical dict-style OHLCV arrays.
• Adds a regression test for the live-bar-list shape that blocked the first post-merge MT5 canary.

Why

After PR #20 merged, the first controlled MT5 canary stopped before broker execution because stage_field_evaluation passed market_state["ohlcv"] as a list of canonical bar dictionaries, while compute_maxwell_tensor only supported dict-style arrays and called .get() on the list.

Validation

• git diff --check
• python -m pytest tests/rootfile/test_lawful_collapse_universe.py -q -> 13 passed
• python -m pytest tests/rootfile/test_mt5_position_close_tracker.py -q -> 3 passed
• python -m pytest tests/rootfile -q -> 143 passed
• python -m pytest tests -q -> 236 passed, 9 warnings

Controlled MT5 canary after fix

• Ran one MT5-only demo canary from this branch after safety preflight.
• Ticket 357844399 was created: SELL EURUSD_r, 0.01 lot, entry 1.17449, SL 1.17649, TP 1.17049.
• PPO pending state persisted with key 357844399, proving the entry durability path is active.
• Runner was stopped immediately after ticket observation.
• Position remains open, so settlement/PPO close feedback must wait for SL/TP/manual close.

Safety

• No Deriv or --mode both path was used.
• No raw logs/ or data/ artifacts are committed.
• kluster review was attempted, but the kluster.ai trial has ended and no verification output is available.