feat: near-close scan schedule and distinct-day gate reset

Move the only qualifying R:R scan to 15:30 ET with chained Telegram alerts,
put outcome eval after a final-bar OHLCV fetch, enforce NY trading-day
requalify semantics, stamp paper trades fill_mode=near_close, and migrate
stored schedule_* keys to America/New_York.

app/services/trade_policy.py

@@ -3,13 +3,24 @@
 from __future__ import annotations
 
 from collections.abc import Iterable
-from datetime import datetime, timezone
+from datetime import date, datetime, timezone
+from zoneinfo import ZoneInfo
 
 from sqlalchemy import func, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.models.paper_trade import PaperTrade
 
+# Gate-reset "day" boundary matches US cash equities session calendar, not UTC.
+_REENTRY_DAY_TZ = ZoneInfo("America/New_York")
+
+
+def _ny_trading_date(moment: datetime) -> date:
+    """Calendar date in America/New_York for a gate-reset observation."""
+    if moment.tzinfo is None:
+        moment = moment.replace(tzinfo=timezone.utc)
+    return moment.astimezone(_REENTRY_DAY_TZ).date()
+
 
 async def _latest_initial_stop_trades(
     db: AsyncSession,
@@ -93,8 +104,14 @@ async def observe_reentry_gate_transitions(
                 trade.reentry_gate_failed_at = timestamp
                 updated.add(ticker_id)
         elif ticker_id in qualified:
-            trade.reentry_gate_requalified_at = timestamp
-            updated.add(ticker_id)
+            # Study semantics: requalify only on a *subsequent* daily observation.
+            # Same America/New_York calendar day as the failure does not unlock,
+            # even if multiple full-universe scans run (manual + near-close).
+            if _ny_trading_date(trade.reentry_gate_failed_at) < _ny_trading_date(
+                timestamp
+            ):
+                trade.reentry_gate_requalified_at = timestamp
+                updated.add(ticker_id)
 
     if updated:
         await db.flush()