improve scheduler

internal/report/snapshots.go

@@ -169,7 +169,11 @@ func MigrateSnapshotRegistry(ctx context.Context, database db.Database) (Snapsho
 		}
 		if snapshotTime.IsZero() {
 			suffix := strings.TrimPrefix(table, "inventory_hourly_")
-			if parsed, parseErr := time.Parse("2006010215", suffix); parseErr == nil {
+			if parsed, parseErr := time.Parse("200601021504", suffix); parseErr == nil {
+				// Name encoded with date+hour+minute (e.g., 15-minute cadence)
+				snapshotTime = parsed
+			} else if parsed, parseErr := time.Parse("2006010215", suffix); parseErr == nil {
+				// Legacy hour-only encoding
 				snapshotTime = parsed
 			} else if epoch, parseErr := strconv.ParseInt(suffix, 10, 64); parseErr == nil {
 				snapshotTime = time.Unix(epoch, 0)