fix(rules): owl's wisdom +2 Will enhancement buff (SRD spells/owl-s-wisdom.md); correct and sharpen the deferred-utility docs for guidance, resistance, virtue, stabilize, saving finale, spiritual weapon (verified SRD texts, engine-track reasons, and the cantrip-buff policy degradation that blocks encoding resistance)

data/spells/owls_wisdom.json

@@ -6,6 +6,14 @@
   "save": "will",
   "base_dc": 10,
   "cast_time": "standard",
-  "effects": [],
-  "description": "The subject gains a +4 enhancement bonus to Wisdom for 1 min/level, adding the usual benefit to Wisdom-based skills, Will saves and spell DCs. Will negates (harmless). Ability-score increases are not modeled by the engine, so the spell has no mechanical effects here."
+  "effects": [
+    {
+      "type": "buff",
+      "modifiers": [
+        { "target": "will", "value": 2, "bonus_type": "enhancement" }
+      ],
+      "duration_rounds": 10
+    }
+  ],
+  "description": "SRD spells/owl-s-wisdom.md: the subject gains a +4 enhancement bonus to Wisdom for 1 min./level. The engine has no ability-score track, so the +4 Wis is encoded as its combat-visible consequence: a +2 enhancement bonus on Will saves (half of +4, as a score modifier feeds saves at half). Wisdom-based skills and spell DCs are not modeled. Will negates (harmless). Duration 1 min/level approximated as 10 rounds."
 }