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

types/type-spec.md

@@ -112,7 +112,7 @@ in once it grows past the shard threshold, and whether a `layout:` is already de
 split it recommends.
 
 A lopsided field is a reason to fix the field, not a reason to leave `layout` off forever -
-`source` was exactly this case (Gitea #66): 25 of 29 pages carried one value because the schema
+`source` was exactly this case: 25 of 29 pages carried one value because the schema
 handed out that value as a *default* whenever nobody chose one, not because the material was
 genuinely that uniform. Once the default was removed and the pages reclassified by what they
 actually were, the field split into six areas with none of them small. Declare `layout` for