docs(changelog): record the unreleased doctor and error-label notes

Version drift failed on #6846 because crates/tui/CHANGELOG.md is a
generated slice of the root file, and the root Unreleased section was
empty while the slice already named /plugin doctor, #6843 and #6795.
The notes now live in the root file. ./scripts/sync-changelog.sh --check
exits 0 and the generated slice is unchanged.

CHANGELOG.md

@@ -7,6 +7,25 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- `/plugin doctor` reports stale built-in records and snapshots, and
+  `/plugin doctor --fix` retires them. A user plugin, a snapshot a running
+  process names, and a snapshot inside the grace window are kept. The
+  previous `state.json` is kept as `state.json.pre-gc`.
+
+### Fixed
+
+- A failure Codewhale can name is no longer labelled an internal fault. An HTTP
+  400/405/409/413/422 rejection, an out-of-credits 402, the context-budget stop
+  and a turn's own step or wall-clock ceiling now carry an input or budget
+  label, and a bare `ERROR` from a provider is reported as an unreadable error
+  instead of a warning. Refs #6843.
+- A transient upstream failure reported as an error frame inside a successful
+  response is retried within the stream retry budget. When the budget is spent
+  the turn fails once with an error card instead of an amber warning that
+  promised a retry. Refs #6795.
+
 ## [0.10.1] - 2026-10-01
 
 Codewhale v0.10.1 focuses on reliability and first-run behavior. Turns that