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/provenance.py

@@ -64,7 +64,22 @@ LEGACY_CITE_RE = re.compile(r"\^\[\[([^\]|#]+)(?:\|([^\]]+))?\]\]")
 # Written under the canonical name, but split_cite_block() matches the aliases
 # too - a page whose block still says "## Footnotes" keeps working until it is
 # translated. See chemenu/sections.py.
-CITE_BLOCK_HEADING = f"## {sections.FOOTNOTES}"
+#
+# Resolved on access rather than bound at import (PEP 562), because the
+# canonical name is now this instance's own - `kb/CONVENTIONS.md`, via
+# chemenu.conventions - and a module constant would freeze whichever corpus the
+# process started in. The functions below take it as a default the same way, via
+# None rather than an evaluated default argument.
+def __getattr__(name: str) -> str:
+    if name == "CITE_BLOCK_HEADING":
+        return f"## {sections.FOOTNOTES}"
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
+
+
+def cite_block_heading_default() -> str:
+    """The Footnotes heading this instance writes, `## ` included."""
+    return f"## {sections.FOOTNOTES}"
+
 
 _SOURCE_TITLE_PREFIX = "Source - "
 
@@ -193,18 +208,23 @@ def cite_block_heading(body: str) -> str:
     alias is untranslated, not broken, and `cite sync` has to stay a no-op on
     it. Translating the heading is the migration's job, not the tool's."""
     match = sections.heading_re(sections.FOOTNOTES).search(body)
-    return match.group(0).strip() if match else CITE_BLOCK_HEADING
+    return match.group(0).strip() if match else cite_block_heading_default()
 
 
 def render_cite_block(
-    definitions: dict[str, tuple[str, Optional[str]]], heading: str = CITE_BLOCK_HEADING
+    definitions: dict[str, tuple[str, Optional[str]]], heading: Optional[str] = None
 ) -> str:
     """Render the Footnotes block for `definitions` (cite_id -> (title,
     qualifier)), preserving dict order. Empty dict renders "" - a page with
-    no citations carries no block at all."""
+    no citations carries no block at all.
+
+    `heading=None` means this instance's canonical Footnotes heading, resolved
+    at call time. It cannot be an evaluated default: the name comes from
+    `kb/CONVENTIONS.md`, so a default bound at import would answer for whichever
+    corpus the process started in."""
     if not definitions:
         return ""
-    lines = [heading, ""]
+    lines = [heading or cite_block_heading_default(), ""]
     for cid, (title, qualifier) in definitions.items():
         target = f"{title}|{qualifier}" if qualifier else title
         lines.append(f"[^{cid}]: [[{target}]]")
@@ -214,7 +234,7 @@ def render_cite_block(
 def render_page_body(
     head: str,
     definitions: dict[str, tuple[str, Optional[str]]],
-    heading: str = CITE_BLOCK_HEADING,
+    heading: Optional[str] = None,
 ) -> str:
     """Reassemble a page body from its non-Footnotes content and citation
     definitions - the inverse of split_cite_block(). Pass the original body's