Ports calc_mudda_with_dasha_balance verbatim from upstream yinduzhanxing
c7117f92 (astrologer round-5 Q7). tajika_mudda.annual_mudda_dasha is the one
product entry for solar_return_full_report, cmd_tajika and full-reading
Step 9; periods are cropped to the Varsha year and carry months for the
month-window consumers. The consultation card re-anchors the engine's dates.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N4f2nya58RoRu4yEmJgRGE
