fix(consume): a covered title rises only past titles that answer no more of the question

Round 16's partition read every concept whose WHOLE title the question
accounts for before everything the fusion ranked above it. That is a claim
about the covered title's PRECISION, and it overrode the fusion even against
a title answering MORE of the question. Measured on a 26-concept bundle of
five documents: the question names a section by three title tokens and holds
a neighbour's whole one-token title (1 of 9 question tokens); the fusion put
the named section at rank 1, the partition moved the neighbour over it.

A covered concept now RISES through the fusion's order and stops beneath the
first concept whose title answers more question tokens, by equality, than it
holds, or beneath a covered concept the fusion put above it. With nothing
above it answering more it reaches the top exactly as before. Same flag
(--title-covered / --no-title-covered), no new parameter, no new constant.

Measured before this commit, delivered ranks from build_payload:
- known-negative: rank 2 -> 1; the payload equals --no-title-covered's
- three own probes on that bundle: 1, 1, 1 (unchanged from round 16)
- R761 XML, 2 761 concepts: hit@1/8/50 6/6 - 6/6 - 6/6 at default k and at
  --k 50, KP rank 1; 8 of 8 payloads byte-identical to 7cca9e0 at BOTH k
- payloads byte-identical to 7cca9e0: K2 pinned 6/6, Arm B 6/6, N100/N200/
  N500 15/15; tests/test_default_bundle_pin.py 7 passed, file untouched
- candidates measured beside it: min title length (R761 hit@1 3/6), share of
  the question (holds only for 1/9 < s <= 1/6), order inside the group
  (group of one: no effect), stop list (no title involved is one)

Suite on the staged set: 1600 passed, 1 skipped.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

CHANGELOG.md

@@ -49,6 +49,42 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   bytes are unchanged -- measured, both tracked bundles byte-identical before
   and after on the same interpreter.
 
+### Fixed
+
+- **`--title-covered` no longer lifts a short title over a title that answers
+  more of the question.** 0.8.1's partition read every concept whose WHOLE
+  title the question accounts for before everything the fusion ranked above
+  it. That is a claim about the covered title's PRECISION, and it overrode the
+  fusion even against a title answering MORE of the question: measured on a
+  26-concept bundle of five tender documents, a question naming a section by
+  three of its title tokens also held a neighbour's whole one-token title, and
+  the neighbour took rank 1 from the section the question names. A covered
+  concept now RISES through the fusion's order and stops beneath the first
+  concept whose title answers more question tokens, by equality, than it
+  holds. Same flag, no new parameter, no new constant.
+  - **What the rule was built for does not move.** On the 2 761-concept bundle
+    of one standard no covered concept had such a title above it, so all 8
+    payloads are byte-identical to 0.8.1's at default `k` AND at `--k 50`;
+    hit@1/8/50 stays 6/6 · 6/6 · 6/6 with the known-positive at rank 1.
+  - **Where the rule never fires nothing moves either**, measured on the bytes:
+    the pinned K2 bundle 6 of 6 payloads identical, Arm B 6 of 6, the three N
+    bundles 15 of 15.
+  - **Four other repairs were measured and not taken**: a minimum title length
+    sold hit@1 back to 3 of 6; a share of the question holds only in a band
+    set by the question's word count (1/9 < s <= 1/6); an order inside the
+    covered group cannot act on a group of one; a closed stop list touches no
+    title involved and would be a new vocabulary to maintain.
+  - **0.8.1's unbounded order is reproducible by no flag.** It differs from
+    this one only where a covered concept has such a title above it -- 1 of
+    the 4 questions measured on that bundle, 0 of 8 on the standard, 0 of 27
+    elsewhere. `--no-title-covered` still reproduces the pre-0.8.1 order.
+  - **One constructed variant still reads the short title first, and no rule
+    reading titles alone separates it.** A shortened form of the same question
+    shares ONE token with each of the two titles; a form that blocks on any
+    token the covered title lacks fixes it and takes one of the standard's
+    scored questions, the same shape with the opposite answer, from rank 1 to
+    3. Report: `docs/2026-09-11-k3-runde17-dekningen-stopper-ved-en-bredere-tittel.md`.
+
 ## [0.8.1] — 2026-09-10
 
 ### Added