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/guidance.json

@@ -7,5 +7,5 @@
   "base_dc": 10,
   "cast_time": "standard",
   "effects": [],
-  "description": "A cantrip: the subject gains a +1 competence bonus on a single attack roll, saving throw, or skill check, declared before the roll (duration 1 minute or until discharged). Will negates (harmless). Single-roll discharge is not modeled by the engine, so the spell has no mechanical effects here."
+  "description": "SRD spells/guidance.md: a cantrip - the subject gets a +1 competence bonus on a SINGLE attack roll, saving throw, or skill check, declared before the roll (duration 1 minute or until discharged). Deferred: the engine's one-shot attack track (aid_attack_bonus) is hardwired to the aid-another +2 and expires at the start of the beneficiary's next turn, and no spell effect can write it; a persistent +1 BuffEffect would misrepresent the discharge rule (it would boost every roll for a minute) and would make guidance the first buff spell in the casters' known-spell order, degrading default_policy. No mechanical effect is applied."
 }