Supersedes the complementary even/odd-eighths tables from 900c810 with
a single shared phase_eighths table used in both 180 and 360 mode, so
subtomo N carries the same phase-tier role regardless of
tomo_angle_range. The complementary property of the low/high phase
sets now falls out as a consequence of the original table's structure
instead of needing a separately derived table.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>