feat: connect explore datasets to backend

backend/internal/models/dataset_source.go

@@ -0,0 +1,22 @@
+package models
+
+import "time"
+
+type SaDatasetSource struct {
+	ID                uint   `gorm:"primaryKey"`
+	Identity          string `gorm:"type:char(36);uniqueIndex"`
+	CreatedBy         uint   `gorm:"index;not null"`
+	CreatedByIdentity string `gorm:"type:char(36);index"`
+	Name              string `gorm:"size:160;not null"`
+	Kind              string `gorm:"size:32;not null"`
+	URL               string `gorm:"size:2048"`
+	Description       string `gorm:"type:text"`
+	Enabled           bool   `gorm:"not null;default:true;index"`
+	LastSyncedAt      *time.Time
+	CreatedAt         time.Time
+	UpdatedAt         time.Time
+}
+
+func (SaDatasetSource) TableName() string {
+	return "sa_dataset_sources"
+}