fix(citation): represent chapter-crossing verse ranges (W4)

Parse.verse_range's [last] endpoint gains an optional chapter
(Parse.verse_end: { chapter : int option; verse : verse_num }), so a
hyphen range whose two endpoints lie in different chapters
("1 John 1:5-2:2") can be represented at all. Rejected: a bare
[int option] living alongside [last] as a second field on
verse_range -- that would let 'a chapter with no verse' exist as a
constructible value.

parse_part now splits a part's leading "chapter:" at the FIRST
colon only (not every colon), so the verses side can itself carry a
second colon from a crossing range. parse_range detects a crossing
by checking whether the range's right-hand side contains ':', and
skips the same-chapter descending-range guard for that case (a later
chapter is always "ahead", whatever its own verse numbers are).
Handles the compound shape too -- a crossing range followed by
further, same-chapter verse references in the same comma list
("Matthew 9:35-10:1,5a,6-8") -- since those trailing pieces parse as
ordinary bare verses/ranges, unaffected by the preceding crossing.

Render's one_range renders a crossing [last] through the same
chapter_verse template one_part already uses for the part's own
leading "chapter:verses", so a style that reconfigures the
chapter/verse separator renders a crossing endpoint in that same
convention rather than a hardcoded ':'.

This closes the W4 known-wrong: 41 (now 49, after an intervening
Second-reading extraction) of the OF lectionary's citations printed
unconverted, every one this exact shape. test_citation_coverage_of.ml's
pinned residual is now empty and asserted exactly, over the full
1725-field data/of/lectionary.sexp population, including the round-trip
check (parse -> render -> parse structural equality). test_citation.ml
gains direct parse-suite cases for the basic crossing, the compound
shape, a mid-list crossing, a crossing with a sub-verse letter, and a
malformed-crossing rejection.

data/of/lectionary.sexp is regenerated via its own generator
(tools/bootstrap_lectionary_of.ml, whose own embedded header text is
updated to match); only comment lines change, confirmed by diff --
no lectionary entry differs. test_lectionary_of.ml's whole-file
SHA-256 pin is updated to match.

EF is unaffected: data/ef/ is untouched since v1.0.0, and a direct
byte comparison of `colitur day`/`colitur readings` for 2026, 1583
and 9999 against a git-worktree build of 1c0137d is identical on all
six outputs.

1 files changed, 16 insertions, 64 deletions

diff --git a/data/of/lectionary.sexp b/data/of/lectionary.sexp
index 7fe5b24..693b768 100644
--- a/data/of/lectionary.sexp
+++ b/data/of/lectionary.sexp
@@ -89,20 +89,21 @@
 ;       ferial (Lectionary_of.readings' own step 2 -> step 3) -- this is
 ;       OLM norms working as designed for a saint with no proper of
 ;       their own, not a gap in this data.
-;   (4) Citation-siglum conversion (fix wave I2, 2026-08-26 review): of
-;       1725 emitted (First, Second, Gospel) citation fields, 49 distinct
-;       references (out of the full 1725) do not parse -- every one a
-;       hyphen range that crosses a chapter boundary ("2:29-3:6"), a
-;       {!Colitur_citation.Parse.t} shape this parser's [part]/
-;       [verse_range] types do not represent, deliberately not built
-;       this task (see book.ml's own [is_single_chapter] neighbourhood
-;       for what WAS fixed: 345 previously-unregistered book names and
-;       verse sub-letter markers, both closed at the parser/book-table
-;       level, not here). Such a reference still prints, verbatim,
-;       never a crash or a dropped citation -- {!Colitur_citation.Sigla
-;       .format}'s own documented contract on a parse miss. Pinned
-;       exactly, both directions, by test/test_citation_coverage_of.ml.
-;       Named below.
+;   (4) Citation-siglum conversion (fix wave I2, 2026-08-26 review;
+;       CLOSED by W4): of 1725 emitted (First, Second, Gospel) citation
+;       fields, 0 distinct references (out of the full 1725) do not
+;       parse. I2/I7 left 49 unconverted here, every one a hyphen
+;       range crossing a chapter boundary ("2:29-3:6"); W4 gave
+;       {!Colitur_citation.Parse.t} a [verse_end] so a range's [last]
+;       can name its own, later chapter (see book.ml's own
+;       [is_single_chapter] neighbourhood for the other, earlier fix:
+;       345 previously-unregistered book names and verse sub-letter
+;       markers, closed at the parser/book-table level). A reference
+;       that still fails to parse would still print verbatim, never a
+;       crash or a dropped citation -- {!Colitur_citation.Sigla
+;       .format}'s own documented contract on a parse miss -- but none
+;       does today. Pinned exactly, both directions, by
+;       test/test_citation_coverage_of.ml. Named below (if any).
 ;   (5) Second-reading coverage (fix wave I7, 2026-08-26): 183 of the
 ;       1725 emitted citation fields above are a Second reading -- every
 ;       one from a SUNDAY-CYCLE (-A/-B/-C, i.e. Sunday/solemnity)
@@ -119,56 +120,7 @@
 ; Regenerate with:
 ;   eval $(opam env) && dune exec tools/bootstrap_lectionary_of.exe -- ../lectio/internal/caldata/of-lectionary.ini data/of/lectionary.sexp
 ; Unmapped lectio bases (0):
-; Citations that do not parse (49 distinct, all chapter-crossing ranges):
-;   1 Corinthians 10:31-11:1
-;   1 Corinthians 12:31-13:13
-;   1 John 1:5-2:2
-;   1 John 2:29-3:6
-;   1 John 3:22-4:6
-;   1 John 4:19-5:4
-;   1 Thessalonians 3:12-4:2
-;   2 Corinthians 3:15-4:1,3-6
-;   2 Corinthians 4:13-5:1
-;   2 Samuel 18:9-10,14b,24-25a,30-19:3
-;   2 Thessalonians 1:11-2:2
-;   2 Thessalonians 2:16-3:5
-;   2 Timothy 3:14-4:2
-;   Colossians 1:24-2:3
-;   Ecclesiastes 11:9-12:8
-;   Ephesians 4:30-5:2
-;   Ephesians 4:32-5:8
-;   Exodus 11:10-12:14
-;   Exodus 14:21-15:1
-;   Ezekiel 2:8-3:4
-;   Galatians 4:22-24,26-27,31-5:1
-;   Genesis 1:1-2:2
-;   Genesis 1:20-2:4a
-;   Habakkuk 1:12-2:4
-;   Hebrews 7:25-8:6
-;   Isaiah 52:13-53:12
-;   Isaiah 8:23b-9:3
-;   James 3:16-4:3
-;   John 15:26-16:4a
-;   John 18:1-19:42
-;   Jonah 1:1-2:2,11
-;   Luke 7:36-8:3
-;   Malachi 1:14b-2:2b,8-10
-;   Mark 2:23-3:6
-;   Mark 8:34-9:1
-;   Matthew 10:34-11:1
-;   Matthew 18:21-19:1
-;   Matthew 9:35-10:1,5a,6-8
-;   Matthew 9:36-10:8
-;   Numbers 13:1-2,25-14:1,26a-29a,34-35
-;   Philippians 3:17-4:1
-;   Revelation 20:1-4,11-21:2
-;   Sirach 27:30-28:7
-;   The Acts 12:24-13:5a
-;   The Acts 17:15,22-18:1
-;   The Acts 7:51-8:1a
-;   Wisdom 11:22-12:2
-;   Wisdom 2:23-3:9
-;   Wisdom 7:22b-8:1
+; Citations that do not parse (0 distinct):
 ; Temporal_of slugs (2004-2051) with no lectionary entry (0, informational --
 ; most are the Christmas-season/late-Advent date-vs-weekday gap named above):
 ((all-saints