feat(of): complete Sunday lectionary from catholic-resources.org (restore 2nd readings)

The niedziela harvest had dropped the SECOND reading on 271 of ~299 Sunday-cycle
entries (a Sunday Mass is first/psalm/second/gospel). scripts/genlect-of-sundays-cr.py
re-sources the temporal Sunday & solemnity lectionary (Ordinary Time, Advent,
Christmas, Lent, Easter, Trinity, Corpus Christi, Sacred Heart, Christ the King;
all three cycles A/B/C) from catholic-resources.org, keyed by liturgical position,
and merges the complete readings into of-lectionary.ini.

- Also corrects ~6 contaminated Sunday first readings the niedziela by-date
  harvest had picked up (ordinary-sunday-21-B had a Marian Prov 8; advent-2-A had
  the Immaculate Conception's Gen 3; Christ the King B/C, Trinity C, Pentecost,
  Ascension/7th-of-Easter were wrong).
- Content-validated: every changed first reading verified against the old one
  (all changes are correct fixes or the identical passage, book spelling aside).
- Handles source quirks: hyphen/en-dash/ABC cycle markers, verbose Year-A
  solemnity names, 'opt:' cycle-proper alternates, '[2025: Corpus Christi]'
  displacement notes appended to names, Palm Sunday (cycle-independent
  first/second, per-cycle Passion gospel kept), and abbreviation variants
  (Jon/Is/Mt/Act/Zac...).

157/157 Sundays render first+psalm+second+gospel across 2026-2028. Adds
TestOFSundayCompleteReadings, credits the source in NOTICE, bumps to 0.42.0.

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