feat: Autorenkonventionen nach Eigentum geschnitten - kb/CONVENTIONS.md, deklarierte Collections (3.0.0)

Files changed:
- .gitea/workflows/ci.yml
- .wikitool-kb.json
- AGENTS.md
- CHANGES.md
- INSTALL.md
- README.md
- VERSION
- instructions/CONTRACT.md
- instructions/dev/testing-conventions.md
- instructions/german-terminology.md
- instructions/kb-profiles.md
- instructions/migrations/3.0.0-authoring-conventions.md
- instructions/private-instance.md
- instructions/setup-instance.md
- instructions/wiki-ingest/SKILL.md
- instructions/wiki-manage/SKILL.md
- kb/CONTRACT.md
- kb/CONVENTIONS.md
- kb/CONVENTIONS.md.template
- kb/comparisons/COLLECTION.md
- kb/concepts/COLLECTION.md
- kb/entities/COLLECTION.md
- kb/sources/COLLECTION.md
- tools/CONTRACT.md
- tools/README.md
- tools/chemenu/commands/dist_cmd.py
- tools/chemenu/commands/docs_verify.py
- tools/chemenu/commands/doctor.py
- tools/chemenu/commands/new_page.py
- tools/chemenu/conventions.py
- tools/chemenu/kb_collections.py
- tools/chemenu/kb_scan.py
- tools/chemenu/provenance.py
- tools/chemenu/sections.py
- tools/chemenu/tests/conftest.py
- tools/chemenu/tests/test_conventions.py
- tools/chemenu/tests/test_dist_cmd.py
- tools/chemenu/tests/test_doctor.py
- tools/chemenu/tests/test_new_page.py
- tools/chemenu/tests/test_types_cmd.py
- types/comparison.md
- types/concept.md
- types/entity.md
- types/source.md
- types/type-spec.md

tools/chemenu/kb_scan.py

@@ -14,9 +14,9 @@ WIKILINK_RE = re.compile(r"\[\[([^\]|#]+)")
 
 
 # Root-level files under kb/ that are not pages: the generated catalog map, log
-# and provenance index, plus the contract that constrains the tree rather than
-# living in it.
-_KB_META_FILES = {"index.md", "log.md", "provenance.md", "CONTRACT.md"}
+# and provenance index, plus the two documents that constrain the tree rather
+# than living in it - the stack's contract and this instance's own conventions.
+_KB_META_FILES = {"index.md", "log.md", "provenance.md", "CONTRACT.md", "CONVENTIONS.md"}
 
 # The per-collection authoring contract. Unlike the meta files above it is never
 # at the kb root - it sits one level down, in every collection - so it has to be