calendar: pull June's sanctoral calendar (pre-1955 pull, 6/12)

18 saints for June, all winning outright on a clean per-annum date — no
stubs this month, including two normally blocked by the generic
"Sanctae Mariae Sabbato" Saturday votive, which just needed a
non-Saturday year instead.

Three distinct Pauline feasts now exist in this pull (Conversion of St.
Paul, Jan 25; Ss. Peter and Paul, June 29; Commemoration of St. Paul,
June 30) plus a second St. Leo (Leo II, June 28, distinct from Leo I in
April). The Nativity of St. John the Baptist (Duplex I. classis, the
highest rank pulled so far) is kept in the sanctoral store despite the
very high rank, same as the Conversion of St. Paul/Chair-of-Peter
feasts — it's about the saint himself, not a feast of the Lord/BVM.

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

src/data/calendar/sanctoral-calendar.yml

@@ -107,6 +107,30 @@ days:
   "05-26": [st-eleutherius]
   "05-27": [st-john-i]
   "05-30": [st-felix-i]
+  # June — 6/12 of the pre-1955 pull. No stubs this month — every
+  # candidate resolved to a real, independently-winnable saint (even the
+  # two normally blocked by the generic Saturday-of-Mary votive). 06-27
+  # (the 4th day of St. John the Baptist's octave) is a pure temporal
+  # continuation with no named secondary saint, so it's excluded, same as
+  # every other octave-continuation day this pull has skipped.
+  "06-02": [ss-marcellinus-peter-and-erasmus]
+  "06-09": [ss-primus-and-felicianus]
+  "06-11": [st-barnabas]
+  "06-12": [ss-basilides-cyrinus-nabor-and-nazarius]
+  "06-13": [st-anthony-of-padua]
+  "06-14": [st-basil-the-great]
+  "06-15": [ss-vitus-modestus-and-crescentia]
+  "06-18": [ss-mark-and-marcellian]
+  "06-19": [ss-gervase-and-protase]
+  "06-20": [st-silverius]
+  "06-22": [st-paulinus-of-nola]
+  "06-23": [vigil-of-st-john-the-baptist]
+  "06-24": [nativity-of-st-john-the-baptist]
+  "06-25": [st-william-abbot]
+  "06-26": [ss-john-and-paul]
+  "06-28": [st-leo-ii]
+  "06-29": [ss-peter-and-paul]
+  "06-30": [commemoration-of-st-paul]
   "08-09": [vigil-of-st-lawrence]
   "08-10": [st-lawrence]
   "08-15": [assumption]