refactor code and improve daily cache handling of deleted VMs

internal/tasks/monthlyAggregate.go

@@ -218,43 +218,6 @@ func (c *CronTask) aggregateMonthlySummaryGo(ctx context.Context, monthStart, mo
 	return nil
 }
 
-type monthlyAggKey struct {
-	Vcenter string
-	VmId    string
-	VmUuid  string
-	Name    string
-}
-
-type monthlyAggVal struct {
-	key            monthlyAggKey
-	inventoryId    int64
-	eventKey       string
-	cloudId        string
-	resourcePool   string
-	datacenter     string
-	cluster        string
-	folder         string
-	isTemplate     string
-	poweredOn      string
-	srmPlaceholder string
-	provisioned    float64
-	vcpuCount      int64
-	ramGB          int64
-	creation       int64
-	deletion       int64
-	lastSnapshot   time.Time
-
-	samplesPresent int64
-	totalSamples   float64
-	sumVcpu        float64
-	sumRam         float64
-	sumDisk        float64
-	tinWeighted    float64
-	bronzeWeighted float64
-	silverWeighted float64
-	goldWeighted   float64
-}
-
 func (c *CronTask) scanDailyTablesParallel(ctx context.Context, snapshots []report.SnapshotRecord) (map[monthlyAggKey]*monthlyAggVal, error) {
 	agg := make(map[monthlyAggKey]*monthlyAggVal, 1024)
 	mu := sync.Mutex{}