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/DeedParser.java

@@ -30,6 +30,7 @@ public class DeedParser {
         File[] deedFiles = CacheParserUtil.listJsonFiles(deedPath);
         int templateId;
         JSONObject deedJson;
+        int failedCount = 0;
 
         for (File deedFile : deedFiles) {
             try {
@@ -38,11 +39,16 @@ public class DeedParser {
                 deedTemplates.put(templateId, parseDeedEntry(templateId, deedJson));
             } catch (Exception e) {
                 Logger.error(deedFile.getName() + ": " + e);
+                failedCount++;
             }
         }
 
         Logger.info("Loaded " + deedTemplates.size() + " of " + deedFiles.length + " deed templates");
 
+        // Partial deed data is never usable; null tells the caller to abort
+        if (failedCount > 0)
+            return null;
+
         return deedTemplates;
     }