feat: parallel Drive upload with indicatif progress UI

- Parallel file uploads with --parallel flag (default 4)
- indicatif MultiProgress: overall bar with file count, speed, ETA
- Per-file spinner bars showing filename during upload
- Phase 1: walk tree + create folders sequentially
- Phase 2: upload files concurrently via semaphore
- Summary line on completion (files, bytes, time, speed)
- Fixed DriveFile/DriveFolder types to match actual API fields
- DriveClient now Clone for Arc sharing across tasks

sunbeam-sdk/Cargo.toml

@@ -55,6 +55,7 @@ base64 = "0.22"
 rand = "0.8"
 aes-gcm = "0.10"
 argon2 = "0.5"
+indicatif = { version = "0.17", features = ["tokio"] }
 
 # Certificate generation
 rcgen = "0.14"