Various fixes and add rune support

module/models/weapon.mjs

@@ -64,6 +64,9 @@ export default class OathHammerWeapon extends foundry.abstract.TypeDataModel {
     // Use this for abilities like Magic Bolt that roll Magic+Willpower instead.
     schema.skillOverride = new fields.StringField({ required: false, nullable: true, initial: null })
 
+    // Attached runic spells (max 2; each is a snapshot of the spell item)
+    schema.runes = new fields.ArrayField(new fields.ObjectField(), { required: true, initial: [] })
+
     return schema
   }