feat(fuse,core,gui,cli): one-request move+rename drain, show who shared an item

- A queued rename that also changes folder now lands as one `move-multiple`
  request carrying the target name instead of rename-then-move, so there is
  no half-applied state and no second call for stale name requirements to
  hit (B46 follow-up). A destination name collision moves under a conflict
  name in one step; same-folder renames still use the rename endpoint.
- Shared with me shows the inviter and invite date (GUI subtitle, `pdfs
  shared-with-me`), with a warning when the invitation signature does not
  verify against the claimed inviter's keys. `DirEntry` gains `shared_by`,
  `shared_at` and `shared_by_unverified`, all serde-defaulted.
- Bump `proton-sdk` / `proton-drive-rs` to 0.6.3 (anonymous-node moves,
  `TrashTime` trashed detection).

Cargo.toml

@@ -15,8 +15,8 @@ keywords = ["proton", "drive", "fuse", "sync", "linux"]
 categories = ["filesystem", "command-line-utilities"]
 
 [workspace.dependencies]
-proton-sdk = { version = "0.6.2" }
-proton-drive-rs = { version = "0.6.2" }
+proton-sdk = { version = "0.6.3" }
+proton-drive-rs = { version = "0.6.3" }
 
 # Internal crates.
 pdfs-core = { path = "crates/pdfs-core" }