docs: raw accept points an occupied captured-bundle name at --replaces-bundle (#177)

The ON FAILURE reaction for an occupied folder name still said there is no
--replaces for a folder; for a captured bundle that sent a new edition down
the rename route. raw/CONTRACT.md names the manifest as a captured folder's
source of the capture fields.

Files changed:
- CHANGES.md
- VERSION
- raw/CONTRACT.md
- tools/CONTRACT.md
- tools/chemenu/commands/raw_cmd.py

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SnAJ7Z3CpVD3PRbN73QtU2

tools/chemenu/commands/raw_cmd.py

@@ -1056,8 +1056,10 @@ def _replace_bundle(
             "`--page` or `--replaces`, holds no file, or holds a hidden entry, a symlink or a "
             "special file; a target path is over the budget; or the folder name is already "
             "occupied under `raw/`",
-            reaction="Nothing moved. Fix what the message names and retry once; for an occupied "
-            "name, rename the folder in `incoming/` - there is no `--replaces` for a folder",
+            reaction="Nothing moved. Fix what the message names and retry once. For an occupied "
+            "name held by a captured bundle, the folder is its new edition: `raw accept "
+            "incoming/<bundle> --replaces-bundle <raw-bundle>`. Any other occupied name: rename "
+            "the folder in `incoming/` - such a folder has no replacement form",
         ),
         cli_contract.Failure(
             label="raw accept",