v1.3.1 - Restore Path Preservation Fix

RustDesk Friendly v1.3.1 fixes a restore-path bug found during internal self-review.

Fixed:

• restore no longer flattens bundle paths by basename
• runtime, policy, service, and log snapshot artifacts are restored into preserved metadata paths
• bundle metadata files no longer overwrite each other during restore
• restore now prefers already-restored app binaries before forcing a target-side download

Validation:

• go test ./...
• go vet ./...
• go build ./cmd/rustdesk-friendly