test(fixtures): replace sector-specific example material with generic, fictitious examples — green

Every fixture, test document, tool example and document now uses an invented
kitchen-and-baking handbook series, written in this repository. The package's
behaviour is unchanged; src/ changes are comments and help text only.

- Generated fixtures are regenerated from their generators. Their structural
  counts are identical before and after: elements, images, rows, cells,
  headings, bookmarks and the witness inventory's per-document totals. The
  image-inbox and accounting documents are renamed kapittel-84-*.
- tools/okf_accounting_gate.py: the two options that named one real corpus
  each are replaced by a generic, repeatable --corpus PATH with no default.
  Row 5 compares the PDF pair alone. Gate verdict unchanged: RED rows 2, 3, 6.
- tools/okf_witness.py: the STS JSON reader for one publisher's delivery is
  removed, along with its three twins and five tests. The mutation harness
  loses W09.
- docs/: 13 dated reports that documented runs on a retired reference corpus
  are removed, and 40 are neutralized. Dead links are removed, and no new
  dangling path is introduced.
- The synthetic MCP-gate corpus and the residual probe words are neutral.

Valgt: keep the `okf quality --fasit` bar value (the measured fraction, one corpus) and
rewrite only its provenance, because the verdict stays unchanged and the
number names nothing.

Term check with the local list: 0 of 411 tracked files, 0 file names, 0 of
27 binary fixtures. Suite after git add: 2457 passed, 1 skipped. The base
tree had 2460 passed and 2 skipped; five tests went with the JSON reader and
four were added by the term check. ruff, ruff format and mypy --strict src/
are clean.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_faceted_index.py

@@ -36,12 +36,12 @@ def test_default_carries_no_facets_and_renders_exactly_what_it_did() -> None:
 def test_a_faceted_policy_renders_present_facets_in_policy_order() -> None:
     policy = STRUCTURED_V1.index
     line = policy.render_link(
-        "N500 Vegbygging",
-        "inbox-n500-vegbygging.md",
-        facets={"status": "gjeldende", "number": "N500"},
+        "Q500 Surdeigsbaking",
+        "inbox-q500-surdeigsbaking.md",
+        facets={"status": "gjeldende", "number": "Q500"},
     )
     assert line == (
-        "- [N500 Vegbygging](inbox-n500-vegbygging.md) — number: N500; status: gjeldende"
+        "- [Q500 Surdeigsbaking](inbox-q500-surdeigsbaking.md) — number: Q500; status: gjeldende"
     )
 
 
@@ -86,12 +86,12 @@ def test_a_facet_value_that_would_break_the_grammar_is_refused_never_repaired(ba
 
 def test_render_and_parse_round_trip() -> None:
     policy = STRUCTURED_V1.index
-    facets = {"number": "N500", "status": "gjeldende", "references": "[N200, N300?]"}
-    line = policy.render_link("N500 Vegbygging", "inbox-n500.md", facets=facets)
+    facets = {"number": "Q500", "status": "gjeldende", "references": "[Q200, Q300?]"}
+    line = policy.render_link("Q500 Surdeigsbaking", "inbox-q500.md", facets=facets)
     entry = policy.parse_entry(line)
     assert entry is not None
-    assert entry.label == "N500 Vegbygging"
-    assert entry.target == "inbox-n500.md"
+    assert entry.label == "Q500 Surdeigsbaking"
+    assert entry.target == "inbox-q500.md"
     assert entry.facets == facets