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/paper_trade_service.py

@@ -333,6 +333,9 @@ async def create_trade(
         target=target,
         status="open",
         opened_at=datetime.now(timezone.utc),
+        # Near-close cutover era — Track Record must not mix with morning-scan
+        # fills or future broker-routed fills when comparing to backtests.
+        fill_mode="near_close",
     )
     db.add(trade)
     await db.commit()
@@ -386,6 +389,7 @@ def _to_dict(
         "alpha_pct": alpha_pct,
         "alpha_usd": alpha_usd,
         "close_reason": trade.close_reason,
+        "fill_mode": trade.fill_mode,
         "trailing_stop": trailing[0] if trailing else None,
         "trailing_distance_pct": trailing[1] if trailing else None,
     }