Rashi dashas

Rashi dashas divide a life into periods ruled by signs rather than by planets. Where the nakshatra dashas start from the Moon's birth star and cycle through the planets, these start from a seed sign — usually the ascendant, sometimes the stronger of the first and seventh, sometimes the ninth — and cycle through the twelve signs, with each sign's length derived from where its lord sits. They belong mostly to the Jaimini stream and are used for concrete outward events, whereas Vimshottari is generally read for inner experience. `dasha_type` selects among twenty schemes. NarayanaRaasi, CharaRaasi, DrigRaasi, SudasaRaasi, KendradhiRaasi, TrikonaRaasi, SthiraRaasi, ShoolaRaasi, NirayanaRaasi, VarnadaRaasi, MandookaRaasi, ParyaayaRaasi, BrahmaRaasi, ChakraRaasi, LagnamsakaRaasi, NavmasaRaasi, YogardhaRaasi, SandhyaRaasi, TaraLagnaRaasi and KalachakraRaasi each pick a different seed sign, direction and period length; several are meant to be applied only when their own applicability conditions hold, and an inapplicable chart can legitimately produce an empty period list. The request mirrors the nakshatra dasha endpoint. `datetime`, `latitude`, `longitude` and `node` build the chart; `dasha_period` chooses the depth from mahadasha down to dehdasha or 'all'; `dasha_start` and `dasha_direction` position the sequence; `days_in_year` sets the year length used to turn periods into dates; `max_levels` caps the nesting and is the main control on response size. The response is `{data: {<dasha_type>: …}}`, with each period given as a lord (a sign name at the top level) together with `start_date` and `end_date`, nested by level when you ask for 'all'. As on the nakshatra endpoint, setting `save_to_file` true replaces the JSON body with a compressed file download.