Collapse a rune's skipped non-skill grant warnings into one line

Archon 2018 logged 12 lines at every boot, one per resistance grant.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/engine/objects/SkillReq.java

@@ -119,6 +119,7 @@ public class SkillReq extends AbstractGameObject {
     private static ArrayList<SkillReq> loadSkillReqsForRune(int runeID) {
 
         ArrayList<SkillReq> runeSkillReqs = new ArrayList<>();
+        ArrayList<String> skippedGrants = new ArrayList<>();
         RuneTemplate rune = RuneTemplate._runes.get(runeID);
         SkillsBase skillsBase;
 
@@ -129,15 +130,18 @@ public class SkillReq extends AbstractGameObject {
 
             skillsBase = DbManager.SkillsBaseQueries.GET_BASE_BY_NAME(skillGrant.skill_type);
 
-            // Archon 2018 grants resistances and Duelist 3010 grants Dueling; neither is a skill
             if (skillsBase == null) {
-                Logger.warn("Rune " + runeID + ": skill grant " + skillGrant.skill_type + " is not a skill");
+                skippedGrants.add(skillGrant.skill_type);
                 continue;
             }
 
             runeSkillReqs.add(new SkillReq(skillGrant, skillsBase, runeID));
         }
 
+        // Expected at every boot: Archon 2018 lists resistances as skill grants (Duelist 3010 lists Dueling); not a bug
+        if (!skippedGrants.isEmpty())
+            Logger.warn("Rune " + runeID + ": skipped non-skill grants " + skippedGrants);
+
         return runeSkillReqs;
     }