calendar: pull July's sanctoral calendar (pre-1955 pull, 7/12)

23 saints for July (18 real + 5 stubs). Caught and corrected a real
mistake in this pull's own methodology: an earlier live-query pass
recorded St. Apollinaris under July 24 based on a year where he'd
actually transferred there (his true date, the 23rd, was a Sunday that
year) — cross-checking against the raw calendar text file
(1570.txt) caught it before it went in. His real date is the 23rd, with
St. Liborius as his (permanently unwinnable) secondary; July 24 is
instead the Vigil of St. James with St. Christina as its own secondary.

Five stubs this month are all genuinely unwinnable (fixed-date
competitors) — the most of any month so far.

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

src/data/calendar/sanctoral-calendar.yml

@@ -131,6 +131,30 @@ days:
   "06-28": [st-leo-ii]
   "06-29": [ss-peter-and-paul]
   "06-30": [commemoration-of-st-paul]
+  # July — 7/12 of the pre-1955 pull. 07-01 through 07-06 are all pure
+  # octave-continuation labels (St. John the Baptist's own octave, then
+  # Ss. Peter and Paul's) with no independently named saint at all, so
+  # they're excluded, same as every other octave-continuation day this
+  # pull has skipped. Five stubs this month, all genuinely unwinnable —
+  # see their own files for which fixed-date competitor blocks each.
+  "07-10": [ss-seven-brothers-rufina-and-secunda]
+  "07-11": [st-pius-i]
+  "07-12": [st-john-gualbert, ss-nabor-and-felix]
+  "07-13": [st-anacletus]
+  "07-14": [st-bonaventure]
+  "07-17": [st-alexius]
+  "07-18": [ss-symphorosa-and-seven-sons]
+  "07-20": [st-margaret-of-antioch]
+  "07-21": [st-praxedes]
+  "07-22": [st-mary-magdalene]
+  "07-23": [st-apollinaris, st-liborius]
+  "07-24": [vigil-of-st-james, st-christina]
+  "07-25": [st-james-the-greater, st-christopher]
+  "07-26": [st-anne]
+  "07-27": [st-pantaleon]
+  "07-28": [ss-nazarius-celsus-victor-and-innocent]
+  "07-29": [st-martha, ss-felix-simplicius-faustinus-and-beatrix]
+  "07-30": [ss-abdon-and-sennen]
   "08-09": [vigil-of-st-lawrence]
   "08-10": [st-lawrence]
   "08-15": [assumption]