Abort world server startup when any deed or rune file fails to parse

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

src/engine/parsers/cache/RuneParser.java

@@ -30,6 +30,7 @@ public class RuneParser {
         File[] runeFiles = CacheParserUtil.listJsonFiles(runePath);
         int templateId;
         JSONObject runeJson;
+        int failedCount = 0;
 
         for (File runeFile : runeFiles) {
             try {
@@ -38,11 +39,16 @@ public class RuneParser {
                 runeTemplates.put(templateId, parseRuneEntry(templateId, runeJson));
             } catch (Exception e) {
                 Logger.error(runeFile.getName() + ": " + e);
+                failedCount++;
             }
         }
 
         Logger.info("Loaded " + runeTemplates.size() + " of " + runeFiles.length + " rune templates");
 
+        // Partial rune data is never usable; null tells the caller to abort
+        if (failedCount > 0)
+            return null;
+
         return runeTemplates;
     }