calendar: pull August's sanctoral calendar (pre-1955 pull, 8/12)

18 saints (14 real winners + 4 stubs), plus propers-slug updates for the
4 pre-existing August entries. Notable this month: several dates have a
real named secondary saint permanently subordinate to an unmodeled fixed
octave (Lawrence's own, the Assumption's) or the fixed Transfiguration --
excluded entirely rather than guessed at, since this app can't yet
represent the actual blocking primary (a known, deferred octave gap).
Most notable casualty: St. Clare (Aug 12).

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

src/data/calendar/saints/ss-felix-and-adauctus.yml

@@ -0,0 +1,16 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live
+# kalendar check on a clean weekday (2027-08-30, a Monday) -- wins outright
+# at Simplex. On a Saturday this date is instead outranked by the generic
+# "Sanctae Mariae Sabbato" votive (confirmed re-checking 2025-08-30, a
+# Saturday, where the votive won instead) -- an artifact of the tested
+# weekday, same pattern as St. Stephen I (Aug 2) this month and Ss.
+# Marcellinus/Peter/Erasmus in June. No unique collect: the raw file at
+# this MM-DD slot (Sancti/08-30.txt) is actually St. Rose of Lima's (a
+# much later, 17th-century addition to this filename slot) -- a live
+# prayTertia query for the Monastic 1617 track returns no Oratio at all,
+# confirming propers: null is correct.
+id: ss-felix-and-adauctus
+name: "Ss. Felix and Adauctus, Martyrs"
+rank: simplex
+common: common-of-several-martyrs
+propers: null