signal_log: persist market snapshots

signal_aggregator.py

@@ -267,11 +267,12 @@ class SignalAggregator:
                     f"{symbol}: live session filter errored — filter SKIPPED this scan"
                 )
 
-        self._log_signal(report, log_source)
+        self._log_signal(report, log_source, dfs)
         return report
 
     def _log_signal(
-        self, report: SignalReport, source: Optional[str]
+        self, report: SignalReport, source: Optional[str],
+        dataframes: Optional[Dict[Timeframe, pd.DataFrame]] = None,
     ) -> None:
         """Persist the scan to the signal-history DB (signal_log.py).
 
@@ -291,6 +292,7 @@ class SignalAggregator:
             context=context,
             source=source or "live",
             timeframe=self.config.primary_timeframe.value,
+            dataframes=dataframes,
         )
 
     def _apply_regime_filter_live(