Focused review pass on the session's safety-critical additions, applying the safe wins:
- exit_manager: drop the dead `_Tracked.last_stop` field (written, never read) and its
assignment; guard `_rest_protective_stop` against a degenerate qty<1 (a 0-qty submit
is rejected and would churn) + document the cur-falsy->breakeven fallback; reword the
synthetic-R comment (the branch is also hit on a healthy trade once breakeven ratchets
the stop to entry, not only the stripped-stop case).
- exits: surface default_trail_r_pct in ExitConfig.describe() (boot-log observability)
and clamp it to [0, 0.95] in from_env (a >=1 / negative synthetic R would put the stop
at/above entry).
- db_pg: comment the gate-vs-try-order distinction of _LAN_DB_HOSTS (superset incl.
localhost) vs _LAN_DB_FALLBACKS so a future edit can't break the non-LAN-DSN guard.
- momentum_cli: drop an unused `import sys`.
Behavior-preserving; 29/29 exit/exits tests green. Deliberately did NOT extract a shared
flatten-vs-rest helper for the catastrophe/naked blocks — the explicit blocks read
clearer for this safety code and the tests guard against drift.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
