功能：完善里程边界与氢耗流式统计

go/vehicle-gateway/internal/stats/daily_metric.go

@@ -302,7 +302,9 @@ func (w *Writer) EnsureSchema(ctx context.Context) error {
 		DailyMileageSourceTableSQL,
 		DailyMileageTableSQL,
 		HydrogenTankCapacityTableSQL,
+		HydrogenEnergyParameterTableSQL,
 		HydrogenStreamStateTableSQL,
+		HydrogenSegmentStreamStateTableSQL,
 	} {
 		if _, err := w.exec.ExecContext(ctx, statement); err != nil {
 			return err
@@ -433,6 +435,15 @@ func (w *Writer) AppendWithResult(ctx context.Context, env envelope.FrameEnvelop
 			if err := w.applyRealtimeBaseline(ctx, &candidate); err != nil {
 				return result, err
 			}
+			// A new natural-day/source row may start from the previous day's
+			// odometer baseline. Attribute that initial delta to the current
+			// running mode so pure-hydrogen mileage remains the complement of
+			// pure-electric mileage from the first accepted sample onward.
+			if candidate.QualityStatus == QualityOK &&
+				candidate.LatestPureHydrogenModeKnown &&
+				candidate.LatestPureHydrogenActive {
+				candidate.PureHydrogenMileageKM = candidate.DailyKM
+			}
 		}
 		projectDaily := w.shouldProjectDailyMileage(sample)
 		if projectDaily {
@@ -868,6 +879,16 @@ func (w *Writer) applyRealtimeBaseline(ctx context.Context, candidate *SourceMil
 		return err
 	}
 	if !found {
+		protocolBaseline, protocolFound, protocolErr := lookupPreviousProtocolBaseline(ctx, w.query, candidate.VIN, candidate.StatDate, candidate.Protocol)
+		if protocolErr != nil {
+			return protocolErr
+		}
+		if protocolFound && candidate.LatestTotalKM+maxNegativeMileageJitterKM < protocolBaseline.LatestTotalKM {
+			candidate.DailyKM = 0
+			candidate.QualityStatus = QualityInvalidDelta
+			candidate.QualityReason = QualityReasonTotalRollback
+			return nil
+		}
 		// If no earlier odometer exists at all, use the first current-day sample.
 		// Later samples retain that boundary through the in-memory baseline cache.
 		candidate.DailyKM = 0
@@ -875,9 +896,25 @@ func (w *Writer) applyRealtimeBaseline(ctx context.Context, candidate *SourceMil
 		candidate.QualityReason = QualityReasonCurrentDayFirst
 		return nil
 	}
+	if !IsUsableDailyMileageBoundary(candidate.StatDate, baseline.LatestEventTime, w.loc) {
+		// A vehicle recovering after one or more empty natural days must start a
+		// fresh day boundary. Otherwise the complete offline-period odometer
+		// increase is incorrectly assigned to the recovery day.
+		candidate.FirstTotalKM = candidate.LatestTotalKM
+		candidate.FirstEventTime = candidate.LatestEventTime
+		candidate.DailyKM = 0
+		candidate.QualityStatus = QualityOK
+		candidate.QualityReason = QualityReasonCurrentDayFirst
+		return nil
+	}
 	candidate.FirstTotalKM = baseline.LatestTotalKM
 	candidate.FirstEventTime = baseline.LatestEventTime
 	candidate.DailyKM = DailyMileageFromDayBoundary(baseline.LatestTotalKM, candidate.LatestTotalKM)
+	if candidate.LatestTotalKM+maxNegativeMileageJitterKM < baseline.LatestTotalKM {
+		candidate.QualityStatus = QualityInvalidDelta
+		candidate.QualityReason = QualityReasonTotalRollback
+		return nil
+	}
 	candidate.QualityStatus = QualityOK
 	candidate.QualityReason = baseline.QualityReason
 	if candidate.QualityReason == "" {