fix(binance): release stale owner under bounded preconditions

[Pigbibi]

What changed

Adds an explicit, manually selected release-stale-owner accounting action for the disabled main + reconcile_only Runtime workflow. It can delete only the existing MULTI_ASSET_STATE__owner document after protected account identity, empty open-orders, safe order state, valid ACTIVE_LKG control, and unchanged owner/ledger/control snapshots are confirmed.

The Firestore operation is one max_attempts=1 transaction with owner-only deletion and mandatory readback. Missing owner is read-only already_absent; any precondition change, transaction uncertainty, or readback uncertainty fails closed without retry. No ledger, control, risk, strategy, or execution fields are changed.

Validation

• PYTHONPATH=. uv run --frozen pytest -q — 901 passed, 91 subtests passed
• uv run --frozen ruff check scripts/migrate_daily_accounting_state.py tests/test_daily_accounting_migration.py tests/test_runtime_workflow_security.py
• git diff --check