Place OCO stop brackets for the catalog's obfuscation options

When an account type opts in, legs are placed as an OCO pair via
order/placeoco - the usual limit plus a stop: the first cycle day's stop
keeps the day's net floor at -$1,000, min-day trades stop at 2x their
target, and the day after any red day rides stopless to make it back. A
stop-out books the day: eligibility refuses the account once realized
P&L falls short of the legs fired (or is simply negative on an opted-in
account, which survives restarts). If placeoco is rejected the leg falls
back to the classic lone limit with a loud log rather than leave a
position without an exit.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

lib/trading-logic.ts

@@ -56,6 +56,10 @@ export const BIG_DAY_THRESHOLD = 1700;
 export const MIN_LEG = 500;
 /** After at least one trade, a residual at or below this counts as "day done". */
 export const LEG_COMPLETION_EPSILON = 25;
+/** firstDayStop: the first cycle day books at this loss and stops. */
+export const FIRST_DAY_STOP = 1000;
+/** minDayStop: a min-day trade's stop sits at this multiple of its target. */
+export const MIN_DAY_STOP_MULT = 2;
 /** Safety valve: never fire more than this many legs per account per trade date. */
 export const MAX_LEGS_PER_DAY = 8;