protondrive: name the SDK commit the client was last checked against

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

backend/protondrive/protondrive.go

@@ -2,9 +2,9 @@
 //
 // The rclone-facing Fs and Object live in this file; the files beside
 // it are a client of the Proton Drive API which follows Proton's Drive
-// SDK, last checked against its tag js/v0.23.0. This file contains no
-// cryptography and no API routes, and the client knows nothing of
-// fs.Fs or fs.Object.
+// SDK, last checked against commit 05c9115 (js/v0.23.0). This file
+// contains no cryptography and no API routes, and the client knows
+// nothing of fs.Fs or fs.Object.
 package protondrive
 
 import (

docs/TODO.md

@@ -117,6 +117,11 @@ Small, specific, independently actionable. Remove only when actually done.
   Commit `b667a1ab0` still has the differential tests and both libraries,
   so such fixtures can be generated from a worktree of it.
 
+- [ ] protondrive: a ranged read of a file which doesn't record its
+  block sizes (written by some other clients) downloads from the first
+  block every time, so random-offset reads of large such files through a
+  mount are slow. Block sizes learnt on a full read could be cached.
+
 - [ ] protondrive: `client.apiCall` retries POST and PUT mutations
   (create folder, move, rename, copy) after 5xx and network errors, as the
   SDK does. If a lost response hid a success, the retry fails with

docs/plans/001-protondrive-tier1-HANDOFF.md

@@ -52,8 +52,8 @@ pause. Last code commit: `9c90998f7`. Plan base (for a whole-branch diff):
 
 | Tasks | State |
 |---|---|
-| 1-19 | Implemented, each independently reviewed, all findings of Critical or Important severity fixed and re-reviewed |
-| 20-21 | Not started (resumed 2026-11-12; see the ledger for current state) |
+| 1-20 | Implemented, each independently reviewed, all findings of Critical or Important severity fixed and re-reviewed |
+| 21 | Not started (resumed 2026-11-12; see the ledger for current state) |
 | Final whole-branch review | Not run |
 
 What exists now: