fix(stats): recover durable daily mileage projections

go/vehicle-gateway/cmd/stat-writer/main.go

@@ -86,6 +86,18 @@ func main() {
 			logger.Info("platform source startup normalization finished", "stat_date", statDate, "protocol", envelope.ProtocolJT808, "normalized", normalized)
 		}
 	}
+	if cfg.ReconcileProjectionsOnStart {
+		statDate := time.Now().In(cfg.Location).Format("2006-01-02")
+		reconcileCtx, cancel := context.WithTimeout(ctx, cfg.ReconcileProjectionsTimeout)
+		result, err := writer.ReconcileDateProjections(reconcileCtx, statDate)
+		cancel()
+		recordStartupProjectionReconcile(registry, result, err)
+		if err != nil {
+			logger.Warn("daily mileage startup projection reconciliation incomplete", "stat_date", statDate, "targets", result.Targets, "attempted", result.Attempted, "written", result.Written, "failed", result.Failed, "error", err)
+		} else {
+			logger.Info("daily mileage startup projection reconciliation finished", "stat_date", statDate, "targets", result.Targets, "written", result.Written)
+		}
+	}
 	var appender statAppender = retryStatAppender{
 		delegate: writer,
 		attempts: cfg.RetryAttempts,
@@ -124,6 +136,20 @@ type pendingProjectionFlusher interface {
 	FlushPendingProjections(context.Context, time.Time) (stats.ProjectionFlushResult, error)
 }
 
+func recordStartupProjectionReconcile(registry *metrics.Registry, result stats.ProjectionReconcileResult, err error) {
+	if registry == nil {
+		return
+	}
+	registry.SetGauge("vehicle_stat_startup_projection_reconcile_targets", nil, float64(result.Targets))
+	registry.SetGauge("vehicle_stat_startup_projection_reconcile_written", nil, float64(result.Written))
+	registry.SetGauge("vehicle_stat_startup_projection_reconcile_failed", nil, float64(result.Failed))
+	status := "ok"
+	if err != nil || result.Failed > 0 {
+		status = "error"
+	}
+	metrics.RecordLastActivity(registry, "vehicle_stat_last_startup_projection_reconcile_unix_seconds", metrics.Labels{"status": status})
+}
+
 func runPendingProjectionFlusher(ctx context.Context, logger interface {
 	Error(string, ...any)
 	Warn(string, ...any)
@@ -919,6 +945,8 @@ type config struct {
 	RetryDelay                      time.Duration
 	NormalizePlatformSourcesOnStart bool
 	NormalizePlatformSourcesTimeout time.Duration
+	ReconcileProjectionsOnStart     bool
+	ReconcileProjectionsTimeout     time.Duration
 	QuarantineDir                   string
 }
 
@@ -963,6 +991,8 @@ func loadConfig() config {
 		RetryDelay:                      time.Duration(envInt("STATS_RETRY_DELAY_MS", 20)) * time.Millisecond,
 		NormalizePlatformSourcesOnStart: env("STATS_NORMALIZE_PLATFORM_SOURCES_ON_START", "true") != "false",
 		NormalizePlatformSourcesTimeout: time.Duration(envInt("STATS_NORMALIZE_PLATFORM_SOURCES_TIMEOUT_SECONDS", 30)) * time.Second,
+		ReconcileProjectionsOnStart:     env("STATS_RECONCILE_PROJECTIONS_ON_START", "true") != "false",
+		ReconcileProjectionsTimeout:     time.Duration(envInt("STATS_RECONCILE_PROJECTIONS_TIMEOUT_SECONDS", 30)) * time.Second,
 		QuarantineDir:                   env("STATS_QUARANTINE_DIR", "/var/lib/lingniu-go-native/stat-writer-quarantine"),
 	}
 }