fix(modifiers): rename deprecated fields and relocate opinion modifier

- dynasty_prestige_mult → monthly_dynasty_prestige_mult
- Remove hostile_scheme_power_mult (removed in CK3 1.18)
- county_opinion → county_opinion_add
- Move disapproves_skaa_mercy to common/opinion_modifiers/ where
  CK3 expects opinion modifier definitions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lords_of_ash/common/modifiers/00_mistborn_modifiers.txt

@@ -45,17 +45,10 @@ steel_ministry_displeasure = {
 breeding_for_allomancy_modifier = {
 	icon = "gfx/interface/icons/modifiers/modifier_compounder.dds"
 
-	dynasty_prestige_mult = 0.1
+	monthly_dynasty_prestige_mult = 0.1
 	fertility = 0.15
 }
 
-# === OPINION MODIFIERS ===
-
-# Noble disapproval for showing mercy to skaa
-disapproves_skaa_mercy = {
-	opinion = -15
-}
-
 # === TIERED LORD RULER ATTENTION ===
 # Applied/removed by the attention threshold system in on_actions
 
@@ -74,7 +67,6 @@ lord_ruler_attention_2 = {
 	monthly_prestige = -0.5
 	diplomacy = -2
 	intrigue = -2
-	hostile_scheme_power_mult = -0.2
 }
 
 # Tier 3 - The Lord Ruler himself takes notice
@@ -85,7 +77,6 @@ lord_ruler_attention_3 = {
 	diplomacy = -4
 	intrigue = -4
 	martial = -2
-	hostile_scheme_power_mult = -0.5
 	enemy_hostile_scheme_success_chance_add = 20
 }
 
@@ -122,7 +113,7 @@ great_house_status = {
 
 	monthly_prestige = 1
 	diplomacy = 2
-	dynasty_prestige_mult = 0.2
+	monthly_dynasty_prestige_mult = 0.2
 }
 
 # Character holds a cache of atium
@@ -148,6 +139,6 @@ ash_blight = {
 koloss_rampage = {
 	icon = "gfx/interface/icons/modifiers/modifier_koloss_rampage.dds"
 
-	county_opinion = -30
+	county_opinion_add = -30
 	development_growth_factor = -0.5
 }

lords_of_ash/common/opinion_modifiers/00_mistborn_opinion_modifiers.txt

@@ -0,0 +1,8 @@
+############################################
+# Mistborn Mod - Opinion Modifiers
+############################################
+
+# Noble disapproval for showing mercy to skaa
+disapproves_skaa_mercy = {
+	opinion = -15
+}