Period lords

GET /v1/vedic/charts/{id}/period-lords?sunrise=<iso>

Five classical period-lord calculations bundled into one call. Sunrise must be the day's actual sunrise (tz-aware) — used by the Horadhipati calculation.

• Ahargana — days since the calibration epoch 1827-05-02 (drives the rest).
• Abdadhipati — lord of the year (annual ruler).
• Masadhipati — lord of the month.
• Varadhipati — lord of the day-of-week.
• Horadhipati — lord of the planetary hour from sunrise.

{
  "ahargana": 72654,
  "abdadhipati": "saturn",
  "masadhipati": "mercury",
  "varadhipati": "venus",
  "horadhipati": "moon"
}

The day-lord and hora-lord follow the classical sequence Sun → Venus → Mercury → Moon → Saturn → Jupiter → Mars; the hora walks one step per hour from the day-lord.