adding support for a collecto config file.

/scrutiny/config/collector.yaml

Adding ability to specify host identifier (label), that is updated on every collector run.
Can be specified by `host-id` CLI or `COLLECTOR_HOST_ID` env var.

Created a config class, interface and associated tests.

Created a "TransformDetectedDrives" function, that will allow users to insert drives not detected by Smarctl --scan, ignore drives that they dont want, and override smartctl device type.

Added Upsert functionality when registering devices.

Replaced "github.com/jinzhu/gorm" with "gorm.io/gorm" (ORM location moved, was using incorrect lib url)
Removed machineid library.

webapp/backend/pkg/models/db/device.go

@@ -21,7 +21,8 @@ type Device struct {
 	UpdatedAt time.Time
 	DeletedAt *time.Time
 
-	WWN string `json:"wwn" gorm:"primary_key"`
+	WWN    string `json:"wwn" gorm:"primary_key"`
+	HostId string `json:"host_id"`
 
 	DeviceName     string  `json:"device_name"`
 	Manufacturer   string  `json:"manufacturer"`
@@ -151,6 +152,8 @@ func (dv *Device) ApplyMetadataRules() error {
 	return nil
 }
 
+// This function is called every time the collector sends SMART data to the API.
+// It can be used to update device data that can change over time.
 func (dv *Device) UpdateFromCollectorSmartInfo(info collector.SmartInfo) error {
 	dv.Firmware = info.FirmwareVersion
 	return nil