calendar: pull February's sanctoral calendar (pre-1955 pull, 2/12)

13 saints for February (12 real + the Vigil of St. Matthias), all
verified winning outright on a clean per-annum date — no secondary/
commemorated stubs needed this month, unlike January.

Two new scope exclusions found this month, beyond the usual octave/
temporal-continuation and fixed Lord/BVM feast ones: the generic
"Sanctae Mariae Sabbato" Saturday votive (not a real saint) and Feb 29's
leap-year redirect of the Vigil of St. Matthias (a real but not-yet-
modeled leap-day date shift).

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

src/data/calendar/sanctoral-calendar.yml

@@ -36,6 +36,26 @@ days:
   "01-26": [st-polycarp]
   "01-27": [st-john-chrysostom]
   "01-28": [st-agnes-secunda]
+  # February — 2/12 of the pre-1955 pull. Same exclusions as January (pure
+  # octave/temporal continuations, fixed Lord/BVM feasts: Purification
+  # Feb 2), plus two new ones found this month: the generic, non-saint
+  # "Sanctae Mariae Sabbato" Saturday votive (Feb 3, whenever that date
+  # falls on a Saturday — St. Blaise's own record ignores it, see his
+  # file), and Feb 29's leap-year redirect of the Vigil of St. Matthias
+  # (a real but not-yet-modeled leap-day date-shift, see st-matthias.yml).
+  "02-01": [st-ignatius-of-antioch]
+  "02-03": [st-blaise]
+  "02-05": [st-agatha]
+  "02-06": [st-dorothea]
+  "02-07": [st-romuald]
+  "02-09": [st-apollonia]
+  "02-10": [st-scholastica]
+  "02-14": [st-valentine]
+  "02-15": [ss-faustinus-and-jovita]
+  "02-18": [st-simeon]
+  "02-22": [chair-of-st-peter-at-antioch]
+  "02-23": [vigil-of-st-matthias]
+  "02-24": [st-matthias]
   "08-09": [vigil-of-st-lawrence]
   "08-10": [st-lawrence]
   "08-15": [assumption]