feat: connect explore datasets to backend

backend/internal/models/dataset_item.go

@@ -0,0 +1,25 @@
+package models
+
+import "time"
+
+type SaDatasetItem struct {
+	ID                uint   `gorm:"primaryKey"`
+	Identity          string `gorm:"type:char(36);uniqueIndex"`
+	SourceID          uint   `gorm:"index;not null"`
+	SourceIdentity    string `gorm:"type:char(36);index"`
+	CreatedBy         uint   `gorm:"index;not null"`
+	CreatedByIdentity string `gorm:"type:char(36);index"`
+	Title             string `gorm:"size:500;not null"`
+	Summary           string `gorm:"type:text"`
+	Content           string `gorm:"type:text"`
+	URL               string `gorm:"size:2048"`
+	Status            string `gorm:"size:32;not null;default:unread;index"`
+	Starred           bool   `gorm:"not null;default:false;index"`
+	PublishedAt       *time.Time
+	CreatedAt         time.Time
+	UpdatedAt         time.Time
+}
+
+func (SaDatasetItem) TableName() string {
+	return "sa_dataset_items"
+}