docs: ausgelieferte Doku zitiert keine Issue-Nummern mehr, docs verify prueft es (schliesst #77)

Files changed:
- .gitignore
- CHANGES.md
- EVALS.md
- INSTALL.md
- README.md
- VERSION
- docs/pipeline-rationale.md
- instructions/CONTRACT.md
- instructions/bootstrap.md
- instructions/dev/issue-tracking.md
- instructions/evolve-subtypes.md
- instructions/kb-profiles.md
- instructions/mcp-read-server.md
- instructions/wiki-ingest/SKILL.md
- kb/CONTRACT.md
- kb/concepts/COLLECTION.md
- kb/sources/COLLECTION.md
- raw/CONTRACT.md
- tools/.coveragerc
- tools/CONTRACT.md
- tools/README.md
- tools/chemenu/commands/docs_verify.py
- tools/chemenu/tests/test_docs_verify.py
- types/source.schema.yaml
- types/type-spec.md

instructions/CONTRACT.md

@@ -215,7 +215,12 @@ the second. Whether the mechanic bites here is not something this repo can curre
 the L2 trajectory scorers read `wikitool` calls, gates and publishes, never an agent's file
 reads, and no tool hook is wired on the primary harness at all - so a `head -100` leaves nothing
 to score. The other half of the claim, what ended up in the context window, produces no event
-anywhere by construction. Gitea #72 records what a test would cost and why it was not bought.
+anywhere by construction.
+
+<!-- dist:strip-start -->
+Gitea #72 records what such a test would cost and why it was not bought. (Kept behind a strip
+marker: the pointer is worth having in the origin repo and resolves nowhere else.)
+<!-- dist:strip-end -->
 
 ### When a skill carries a copy-in checklist