calendar: pull January's sanctoral calendar (pre-1955 pull, 1/12)

20 saints for January, verified per-day against Divinum Officium (Monastic
Tridentinum 1617): 13 that actually win their day outright (rank pulled
from a live per-date query, since the static 1570/M1617 calendar text
files turned out unreliable once monastic-specific overrides apply) and
7 stubs for saints that only ever get commemorated, with an explicitly
flagged, unverified simplex rank guess pending correction.

Deliberately out of scope: pure octave-continuation days (In Octava S.
Stephani, the Epiphany-octave ferias) and fixed-date feasts of the
Lord/BMV (Circumcision, Epiphany) — sanctoral only, not temporal.

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

src/data/calendar/sanctoral-calendar.yml

@@ -12,6 +12,30 @@
 # privileged-day lists. `example-confessor` is deliberately NOT mapped to
 # any day here — it's fictional, kept only to document the record shape.
 days:
+  # January — first month of the pre-1955 pull (see the saint files' own
+  # comments for source/verification detail per entry). Deliberately
+  # excludes: pure octave-continuation days (In Octava S. Stephani, the
+  # several "die infra Octavam Epiphaniae" days, etc. — not sanctoral,
+  # out of scope per the Non-goals discussion) and fixed-date feasts of
+  # the Lord/BMV (Circumcision Jan 1, Epiphany Jan 6 — temporal, not
+  # sanctoral, and not modeled by this app at all yet, a separate gap).
+  "01-05": [st-telesphorus]
+  "01-11": [st-hyginus]
+  "01-14": [st-felix-presbyter]
+  "01-15": [st-maurus-abbot]
+  "01-16": [st-marcellus-i]
+  "01-17": [st-anthony-abbot]
+  "01-18": [chair-of-st-peter-at-rome, st-prisca]
+  "01-19": [st-paul-the-hermit, ss-marius-martha-audifax-and-abachum]
+  "01-20": [ss-fabian-and-sebastian]
+  "01-21": [st-agnes]
+  "01-22": [ss-vincent-and-anastasius]
+  "01-23": [st-hilary-of-poitiers, st-emerentiana]
+  "01-24": [st-timothy]
+  "01-25": [conversion-of-st-paul]
+  "01-26": [st-polycarp]
+  "01-27": [st-john-chrysostom]
+  "01-28": [st-agnes-secunda]
   "08-09": [vigil-of-st-lawrence]
   "08-10": [st-lawrence]
   "08-15": [assumption]