docs: general wording for the remaining example-base totals

Replace the combined concept total, the distinct-token total and the
per-level document count of earlier example bases with general wording
in prose, comments and docstrings. No constant, assertion or test data
changes.

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

src/portfolio_optimiser/okf.py

@@ -115,7 +115,7 @@ def _frontmatter_from_text(text: str) -> dict[str, str]:
     key (``sources:\\n  - title: …`` names the SOURCE, not the concept) and must never overwrite
     the concept's own field, however late it appears in the scan. Measured 2026-09-13 on
     the corpus build's concepts: without this, every ``sources:``-bearing file's nested ``title``
-    replaced its own, collapsing 4605 concepts to 4 distinct titles. A nested line with no
+    replaced its own, collapsing every concept to its base's one title. A nested line with no
     top-level counterpart is still preserved (OKF SPEC §4, "unknown fields are preserved")."""
     fm: dict[str, str] = {}
     top_level: set[str] = set()
@@ -804,7 +804,7 @@ def read_provenance(
         # acts on.
         items = sum(1 for ln in continuation if ln.strip().startswith("- "))
         # P13b: the block sequence of mappings is SPEC §5.1's own example and the form all four
-        # delivered bases actually write (4605/4605, measured). It is decoded by the second carrier
+        # delivered bases actually write (every concept, measured). It is decoded by the second carrier
         # of the one grammar; a block MAPPING (no item opened) and anything the grammar refuses
         # still come back unreadable, which is what keeps "we could not read it" from quietly
         # becoming "there was nothing to read".

src/portfolio_optimiser/validator.py

@@ -295,7 +295,7 @@ _GROUNDING_MIN_LENGTH: Final = 3
 #: The share of the grounding's DOCUMENTS above which a token identifies nothing.
 #:
 #: MEASURED over the four delivered corpora, counting document frequency for every code-shaped
-#: token (``generate._IDENTIFIER_FORMS``): 1 692 distinct tokens, and NOT ONE reaches 5 % of its
+#: token (``generate._IDENTIFIER_FORMS``): well over a thousand distinct tokens, and NOT ONE reaches 5 % of its
 #: base's documents. The highest anywhere is 1.35 % (6 documents); the highest that a fasit or mandate
 #: actually names is 0.67 % (3 documents). P16's fabricated ``P900`` is in every one — 100 %.
 #: 5 % therefore sits 3.7x above the highest real token measured and 20x below the defect.