feat: people live on their organization's page until promoted; organization subtype, member-of, broken_anchors lint (#172)

Files changed:
- CHANGES.md
- README.md
- VERSION
- instructions/kb-profiles.md
- instructions/link-taxonomy.md
- instructions/page-lifecycle.md
- instructions/wiki-ingest/SKILL.md
- instructions/wiki-lint/SKILL.md
- kb/entities/COLLECTION.md
- kb/entities/INDEX.md
- kb/entities/organizations/E3DC GmbH.md
- kb/entities/people/E3DC GmbH.md
- kb/index.md
- kb/log.md
- tools/CONTRACT.md
- tools/chemenu/commands/lint.py
- tools/chemenu/kb_scan.py
- tools/chemenu/lint_core.py
- tools/chemenu/tests/test_lint.py
- tools/chemenu/tests/test_new_page.py
- tools/chemenu/tests/test_type_resolver.py
- tools/chemenu/tests/test_types_cmd.py
- types/entity.md
- types/entity.organization.md
- types/entity.person.md
- types/entity.schema.yaml

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SnAJ7Z3CpVD3PRbN73QtU2

tools/CONTRACT.md

@@ -1124,6 +1124,7 @@ Run structural lint checks against kb/.
 - Structural and provenance checks over `kb/`: broken wikilinks, wikilinks wrapped across a line break, dangling frontmatter references, orphan pages, index drift, schema gaps, duplicate titles, title mismatches, uncovered raw files, broken `raw_files:` refs, raw files claimed by more than one source page, unmarked provenance, citation/frontmatter drift, and unbalanced generated-region markers.
 - Unportable Titles is a hard finding, and hard at every `kb_version`: a page whose title is not a valid file name on Windows and macOS (forbidden character, reserved name, trailing dot or space), or that collides with another page by case or Unicode normalization. `wikitool rename` is the fix.
 - Wrapped Wikilinks is a hard finding: a `[[...]]` with a line break inside it. The link graph reads it as the title it folds to (the break and its indentation become one space), so it is not also a broken link unless that title is missing; the fix is to put it back on one line.
+- Broken Anchors is advisory: a `[[Page#Section]]` whose page exists but has no heading the anchor names (any level, compared without case, inline-code backticks or extra whitespace; every segment of a nested `[[Page#A#B]]`). The link still reaches the page, so nothing else reports it - typically a section that was promoted to a page of its own or renamed. A missing page is Broken Wikilinks instead.
 - Pages nested more than one directory below their collection are a hard finding - the generated catalog folds these into their area silently rather than merely reading it.
 - Edges whose label is missing or not authorised by the source collection's `outbound:` are both hard once `kb_version` has reached the release that introduced labelled edges, and advisory below it.
 - Advisory only: `see-also` edges whose reverse direction already carries a specific label - never migration-gated.