docs: raw/CONTRACT.md points at the path budget for a name accepted from incoming/ (#163)

Files changed:
- CHANGES.md
- VERSION
- raw/CONTRACT.md

raw/CONTRACT.md

@@ -74,6 +74,11 @@ tools/wikitool raw accept --fidelity verbatim --authority reporting incoming/han
 # -> raw/2026/09/handbuch.pdf
 ```
 
+The file's name becomes part of its path under `raw/`, and that path has the same budget as a
+page's - [kb/CONTRACT.md § Titles are identifiers](../kb/CONTRACT.md#titles-are-identifiers).
+`raw accept` refuses a target over it before anything moves; the fix is a shorter name in
+`incoming/`.
+
 **A bundle directory is created only from the second file onward.** One file promoted alone needs
 no directory of its own and lands as `raw/<YYYY>/<MM>/<name>`; promoting several files of one
 source in the same call nests them under `raw/<YYYY>/<MM>/<stem>/`, named after the first file's