docs(rust): record policy seams

Synchronize the ownership map with the default-window decompression policy, the Rust-owned single-file --list ordering, and CDict match-state reset policy moved in the latest migration cycle.

Test Plan:

- git diff --cached --check

rust/README.md

@@ -127,8 +127,8 @@ zstd ABI:
   - `zstd_decompress` owns the public decompression context, one-shot,
     dictionary, parameter, and streaming state machines.  Its C shim retains
     the configuration-dependent context layout and platform details, plus
-    legacy and trace leaves; Rust owns the no-forward-progress threshold and
-    heap-mode policies, decoder storage allocation, custom memory dispatch, and the
+    legacy and trace leaves; Rust owns the default-window, no-forward-progress,
+    and heap-mode policies, decoder storage allocation, custom memory dispatch, and the
     `ZSTD_copyDCtx` prefix copy up to the projected `inBuff` field.
 - Command-line frontend
   - `zstd_cli` owns the Rust parser, safety policy, and dispatch.  It is built
@@ -141,8 +141,9 @@ zstd ABI:
     optional-format decompression loops, decompression result policy/final
     accounting, both shared- and separate-destination multi-file compression
     schedulers, and both shared- and separate-destination decompression
-    schedulers. Rust also owns the scalar compression metadata-transfer and
-    file-removal status policies; C retains the private stat probe, metadata operations,
+    schedulers. Rust also owns the per-file `--list` status/order policy, the
+    scalar compression metadata-transfer and file-removal status policies; C
+    retains the private stat probe, metadata operations,
     destination-name construction, and the private file/resource/format
     callbacks for these scheduler boundaries.
     Rust already owns the file preference policy, filename decisions,
@@ -191,7 +192,7 @@ and advanced-CDict dictionary-content loading remain in C. Rust now owns
 advanced-CDict custom-memory validation, workspace-size query/allocation,
 allocation/create/init cleanup ordering, the CCtx workspace-size formula, the
 scalar CCtx-reset plan, post-match-state storage reservation order, and
-match-state reset policy/order; C retains
+match-state reset policy/order for both CCtx and CDict; C retains
 private layout-size inputs, workspace resize/layout, private field publication,
 and allocator callbacks. Private CCtx reset/matchfinder/workspace operations
 and codec/adaptive-policy