feat(backups): add SFTP and FTP backup destination types

Add support for SFTP and FTP as backup destination types alongside
existing S3 compatible storage. Uses rclone's native backends.

Changes:
- Add destinationType column to destination schema with migration
- Add getRcloneFlags() and getRcloneRemote() to centralize rclone
  command generation for all destination types
- Passwords are obscured via rclone obscure before storage
- Shell-escape user inputs to prevent command injection
- Update all backup, restore, and volume-backup modules
- Add destination type selector in UI with conditional form fields
- Add conditional validation (S3 fields required for S3, host/username
  required for SFTP/FTP)
- Show destination type badge in destination list

Fixes #168

Author: VladislavTsytrikov

apps/dokploy/components/dashboard/settings/destination/handle-destinations.tsx

@@ -24,11 +24,11 @@ export const ShowDestinations = () => {
 					<CardHeader className="">
 						<CardTitle className="text-xl flex flex-row gap-2">
 							<Database className="size-6 text-muted-foreground self-center" />
-							S3 Destinations
+							Backup Destinations
 						</CardTitle>
 						<CardDescription>
-							Add your providers like AWS S3, Cloudflare R2, Wasabi,
-							DigitalOcean Spaces etc.
+							Add your backup destinations: S3 compatible storage (AWS,
+							Cloudflare R2, Wasabi, etc.), SFTP, or FTP servers.
 						</CardDescription>
 					</CardHeader>
 					<CardContent className="space-y-2 py-8 border-t">
@@ -60,6 +60,11 @@ export const ShowDestinations = () => {
 														<div className="flex flex-col gap-1">
 															<span className="text-sm">
 																{index + 1}. {destination.name}
+																<span className="text-xs bg-muted px-1.5 py-0.5 rounded ml-2 font-medium">
+																	{(
+																		destination.destinationType || "s3"
+																	).toUpperCase()}
+																</span>
 															</span>
 															<span className="text-xs text-muted-foreground">
 																Created at:{" "}

apps/dokploy/components/dashboard/settings/destination/show-destinations.tsx

@@ -0,0 +1,6 @@
+ALTER TABLE "destination" ADD COLUMN "destinationType" text DEFAULT 's3' NOT NULL;--> statement-breakpoint
+ALTER TABLE "destination" ADD COLUMN "host" text;--> statement-breakpoint
+ALTER TABLE "destination" ADD COLUMN "port" integer;--> statement-breakpoint
+ALTER TABLE "destination" ADD COLUMN "username" text;--> statement-breakpoint
+ALTER TABLE "destination" ADD COLUMN "password" text;--> statement-breakpoint
+ALTER TABLE "destination" ADD COLUMN "basePath" text;