fix ghost LaborRecord entries for non-working prisoners on escape

src/main/java/com/tiedup/remake/prison/PrisonerManager.java

@@ -113,6 +113,14 @@ public class PrisonerManager extends SavedData {
         return laborRecords.computeIfAbsent(playerId, id -> new LaborRecord());
     }
 
+    /**
+     * Get labor record only if one exists. Does not create ghost entries.
+     */
+    @Nullable
+    public LaborRecord getLaborRecordIfExists(UUID playerId) {
+        return laborRecords.get(playerId);
+    }
+
     /**
      * Set the labor record for a player.
      */