feat(backup): добавить таблицу для резервных копий и функции для работы с ними

backend/src/db/schema.ts

@@ -340,6 +340,17 @@ export const backupScheduleSettings = sqliteTable("backup_schedule_settings", {
   updatedAt:      text("updated_at").notNull().default(sql`(datetime('now'))`),
 })
 
+export const backupEntries = sqliteTable("backup_entries", {
+  id:         text("id").primaryKey(),
+  serverId:   text("server_id").notNull(),
+  serverName: text("server_name").notNull(),
+  filename:   text("filename").notNull(),
+  sizeBytes:  integer("size_bytes").notNull(),
+  kind:       text("kind", { enum: ["manual", "auto"] }).notNull().default("manual"),
+  notes:      text("notes"),
+  createdAt:  text("created_at").notNull(),
+})
+
 /** Группы правил: ANY = хотя бы одно; ALL = все одновременно в окне тика. */
 export const alertGroups = sqliteTable("alert_groups", {
   id:                text("id").primaryKey(),
@@ -562,6 +573,7 @@ export type AcmeSettingsRow = typeof acmeSettings.$inferSelect
 export type CertificateIssueJobRow = typeof certificateIssueJobs.$inferSelect
 export type CertificateRenewSettingsRow = typeof certificateRenewSettings.$inferSelect
 export type BackupScheduleSettingsRow = typeof backupScheduleSettings.$inferSelect
+export type BackupEntryRow = typeof backupEntries.$inferSelect
 export type AlertGroupRow = typeof alertGroups.$inferSelect
 export type AlertRuleRow = typeof alertRules.$inferSelect
 export type AlertRuleTargetRow = typeof alertRuleTargets.$inferSelect