Add provider worker code

Runners now get created and cleaned up in scale sets.

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

database/sql/models.go

@@ -86,17 +86,6 @@ type Pool struct {
 	Priority  uint       `gorm:"index:idx_pool_priority"`
 }
 
-type ScaleSetEvent struct {
-	gorm.Model
-
-	EventType  params.EventType
-	EventLevel params.EventLevel
-	Message    string `gorm:"type:text"`
-
-	ScaleSetID uint     `gorm:"index:idx_scale_set_event"`
-	ScaleSet   ScaleSet `gorm:"foreignKey:ScaleSetID"`
-}
-
 // ScaleSet represents a github scale set. Scale sets are almost identical to pools with a few
 // notable exceptions:
 //   - Labels are no longer relevant
@@ -146,11 +135,7 @@ type ScaleSet struct {
 	EnterpriseID *uuid.UUID `gorm:"index"`
 	Enterprise   Enterprise `gorm:"foreignKey:EnterpriseID"`
 
-	Status       string
-	StatusReason string `gorm:"type:text"`
-
-	Instances []Instance      `gorm:"foreignKey:ScaleSetFkID"`
-	Events    []ScaleSetEvent `gorm:"foreignKey:ScaleSetID;constraint:OnDelete:CASCADE,OnUpdate:CASCADE;"`
+	Instances []Instance `gorm:"foreignKey:ScaleSetFkID"`
 }
 
 type RepositoryEvent struct {