feat: sync current progress (P0 hardening + P1 observability + deploy docs/systemd)

internal/model/reminder_dead_letter.go

@@ -0,0 +1,17 @@
+package model
+
+import "time"
+
+type ReminderDeadLetter struct {
+	ID         uint      `json:"id" gorm:"primaryKey"`
+	ReminderID uint      `json:"reminder_id" gorm:"not null;uniqueIndex"`
+	UserID     uint      `json:"user_id" gorm:"not null;index"`
+	AssetID    uint      `json:"asset_id" gorm:"not null;index"`
+	RemindAt   time.Time `json:"remind_at" gorm:"not null;index"`
+	Channel    string    `json:"channel" gorm:"size:32;not null"`
+	Status     string    `json:"status" gorm:"size:16;not null"`
+	RetryCount int       `json:"retry_count" gorm:"not null"`
+	LastError  string    `json:"last_error" gorm:"size:500"`
+	CreatedAt  time.Time `json:"created_at"`
+	UpdatedAt  time.Time `json:"updated_at"`
+}