fix(retrieval-gate): row 8 is the three sets, and its headline is one granularity

Two of PM's eight attacks, closed where they were measured.

J2 -- a set left out. `REQUIRED_REAL_SETS` names the three (`wiki-20`,
`r761-sk2`, `vegnormal-32`) and the row is NOT RUN until all three are given,
whatever the ones that ran scored. The numbers the run DID measure are still
printed: a missing set must not cost the reader the set that was measured, and
"not run" is the row's status, never a reason to withhold a figure.

J2b -- the headline was `quoted_hits + concept_hits` over
`quoted_units + concept_units`, written one line above the detail that says
the two are not summed. The three sets do not share a unit: `wiki-20` names a
citation, `r761-sk2` a section title, `vegnormal-32` a requirement number, and
a citation hit plus a concept hit is a number that is neither. A QUESTION is
the one unit all three have, so the headline is questions answered of
questions asked -- answered meaning at least one of the question's fasit
entries arrived, the reading row 1 already prints beside its own units -- and
the two unit totals keep their own denominators below it, unsummed.

49 passed (was 46 passed, 3 failed). The gate is unchanged where it did not
run: still exit 1, still `0 of 3 NOT RUN` with PM's recorded figures carried.

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

tests/test_retrieval_gate.py

@@ -760,11 +760,7 @@ def _hitting_set(set_id: str, *, quote: str) -> gate.QuestionSet:
             gate.Question(
                 id=f"{set_id}-1",
                 question="Naar kontrolleres vinterberedskapen paa hytta?",
-                fasit=(
-                    gate.Fasit(
-                        by="concept", value="haandbok/vinterberedskap", quote=quote
-                    ),
-                ),
+                fasit=(gate.Fasit(by="concept", value="haandbok/vinterberedskap", quote=quote),),
             ),
         ),
         controls=(),