Upstream yinduzhanxing 41d1c740 / 59c9139f, hand-merged; 089858c0 verified not applicable.
- solar_return: dt_local was the UT instant verbatim (no caller ever added the
offset). Localise with ZoneInfo at the return instant (IANA id) or the fixed
offset; expose annual_location; Sahams day/night at the true instant;
optional current_location return charts.
- cmd_solar_return / annual_tajika_pack / engine: pass birth IANA zone and
--solar-return-location-mode / --current-* through; external PyJHora
replay blocked when relocated.
- output_json keeps the upstream stream= signature; PL9 exports written
compact via dumps (measured faster than json.dump streaming), 9.57 -> 4.61 MB.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017eEAG8HD3mm8gsKXgk8uU8