docs verify: DEVELOPMENT.md in STAGE_READMES; self-labelling release notes; prose corrections to 4.6.0 (#47 Block 3)

Files changed:
- .gitea/workflows/release.yml
- CHANGES.md
- VERSION
- instructions/dev/stack-close/SKILL.md
- tools/CONTRACT.md
- tools/chemenu/commands/docs_verify.py
- tools/chemenu/commands/git_publish.py
- tools/chemenu/tests/test_docs_verify.py

tools/chemenu/tests/test_docs_verify.py

@@ -100,6 +100,30 @@ def test_install_md_is_checked_too(tmp_path, monkeypatch):
     assert any("`doctor`" in issue for issue in issues)
 
 
+def test_development_md_is_checked_too(tmp_path, monkeypatch):
+    """DEVELOPMENT.md drifted exactly this way once (Gitea #47): a table
+    describing what each verify command checks, removed by hand because nothing
+    compared it to anything."""
+    root = tmp_path
+    (root / "DEVELOPMENT.md").write_text(
+        "| Command | Purpose |\n| `docs verify` | checks docs |\n", encoding="utf-8"
+    )
+    monkeypatch.setattr(docs_verify.config, "ROOT", root)
+    monkeypatch.setattr(docs_verify, "ROOT_README", root / "README.md")  # doesn't exist here
+    issues = docs_verify.check_readmes_have_no_command_table()
+    assert any("`docs verify`" in issue for issue in issues)
+
+
+def test_an_absent_listed_doc_is_skipped_not_reported(tmp_path, monkeypatch):
+    """The distributed-instance case: DEVELOPMENT.md is not shipped, so listing
+    it must stay inert where the file does not exist rather than failing a tree
+    that is correct."""
+    root = tmp_path
+    monkeypatch.setattr(docs_verify.config, "ROOT", root)
+    monkeypatch.setattr(docs_verify, "ROOT_README", root / "README.md")
+    assert docs_verify.check_readmes_have_no_command_table() == []
+
+
 def test_legacy_type_blocks_are_absent():
     assert docs_verify.check_legacy_type_blocks() == []