fix(special-lagnas): compute eight birth points without PyJHora

Production images do not install PyJHora, so those eight points were blocked.
Swiss Ephemeris now computes them in-process. Rectification keeps the old
Hora and Ghati formulas.

BUG-1273.

scripts/pyjhora_rectification_d1_reference.py

@@ -0,0 +1,35 @@
+"""Optional PyJHora D1 signs for the rectification parity packet.
+
+The product packet calls this only for the PyJHora column. A missing install
+raises, and the packet records that column as blocked.
+"""
+
+from __future__ import annotations
+
+import importlib
+from typing import Any
+
+SIGNS = (
+    "Aries", "Taurus", "Gemini", "Cancer", "Leo", "Virgo",
+    "Libra", "Scorpio", "Sagittarius", "Capricorn", "Aquarius", "Pisces",
+)
+
+
+def pyjhora_d1(case: dict[str, Any]) -> dict[str, str]:
+    utils = importlib.import_module("jhora.utils")
+    charts = importlib.import_module("jhora.horoscope.chart.charts")
+    drik = importlib.import_module("jhora.panchanga.drik")
+    jd = utils.julian_day_number(
+        (case["year"], case["month"], case["day"]),
+        (case["hour"], case["minute"], case.get("second", 0)),
+    )
+    drik.set_ayanamsa_mode("LAHIRI", jd=jd)
+    place = drik.Place("request-level", case["lat"], case["lon"], case["tz"])
+    index_to_planet = {
+        0: "Sun", 1: "Moon", 2: "Mars", 3: "Mercury", 4: "Jupiter", 5: "Venus", 6: "Saturn",
+    }
+    return {
+        index_to_planet[body]: SIGNS[int(position[0])]
+        for body, position in charts.rasi_chart(jd, place)
+        if body in index_to_planet
+    }