- NOTIFY_LEVELS chooses which event levels are sent (default trade,error).
- NOTIFY_LIFECYCLE sends explicit start/stop messages; the kill switch always
notifies at error level.
- SUMMARY_INTERVAL_MINUTES sends a periodic portfolio summary (equity, per
strategy P&L, allocation, halted state) via a background task started with
the run and stopped on stop/kill/shutdown.
- Wires the new vars plus the go-live vars through both compose files and the
deploy workflow. Adds tests.