feat: add Ekadhipatya Shodhana

(cherry picked from commit 868f1dadb69e870fbf20223e4fcd0550286bc220)

tests/test_trikona_shodhana.py

@@ -5,10 +5,19 @@ from pathlib import Path
 ROOT = Path(__file__).resolve().parents[1]
 sys.path.insert(0, str(ROOT / 'scripts'))
 
-from ashtakavarga import calc_trikona_shodhana  # noqa: E402
+from ashtakavarga import calc_ekadhipatya_shodhana, calc_trikona_shodhana  # noqa: E402
 
 
 def test_trikona_shodhana_removes_each_trine_baseline() -> None:
     result = calc_trikona_shodhana(list(range(1, 13)))
     assert result['reduced_scores'] == [0, 0, 0, 0, 4, 4, 4, 4, 8, 8, 8, 8]
     assert result['trikona_groups'][0]['baseline_removed'] == 1
+
+
+def test_ekadhipatya_shodhana_records_occupied_vacant_pair() -> None:
+    result = calc_ekadhipatya_shodhana(
+        {'Sun': [0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 3, 0]},
+        {9},
+    )
+    assert result['rows']['Sun'][9:11] == [6, 0]
+    assert result['audit'][0]['pair'] == [9, 10]