fix(rules): delay disease is a level-2 conjuration (healing) spell, not level-3 abjuration

data/spells/delay_disease.json

@@ -1,11 +1,11 @@
 {
   "name": "Delay Disease",
-  "level": 3,
-  "school": "abjuration",
+  "level": 2,
+  "school": "conjuration",
   "range": "touch",
   "save": "fort",
   "base_dc": 10,
   "cast_time": "standard",
   "effects": [],
-  "description": "You suppress the progression of one disease the subject carries for 1 hour/level, keeping it dormant. Utility spell, no combat-mechanical effect in the engine. Fortitude negates (harmless)."
+  "description": "SRD spells/delay-disease.md: conjuration (healing), level 2 for nearly every divine/prime class (witch 1 for ratfolk); the engine pins the common level 2. The target becomes temporarily immune to disease for 1 day. Utility spell, no combat-mechanical effect in the engine. Fortitude negates (harmless)."
 }

tests/test_spell_registry_batch1.py

@@ -54,7 +54,7 @@ _BATCH1: dict[str, tuple[str, int, str, str, str]] = {
     "Darkness": ("darkness", 2, "evocation", "touch", "none"),
     "Daze": ("daze", 0, "enchantment", "close", "will"),
     "Deja Vu": ("deja_vu", 1, "enchantment", "medium", "none"),
-    "Delay Disease": ("delay_disease", 3, "abjuration", "touch", "fort"),
+    "Delay Disease": ("delay_disease", 2, "conjuration", "touch", "fort"),
     "Delay Poison": ("delay_poison", 2, "abjuration", "touch", "fort"),
     "Detect Fiendish Presence": ("detect_fiendish_presence", 0, "divination", "close", "none"),
     "Detect Magic": ("detect_magic", 0, "divination", "close", "none"),