fix(memory): use auto-incrementing id as tick proxy for recency scoring

Events recorded with tick: 0 now get a meaningful tick value from the
service's internal counter, ensuring selectForPrompt recency scoring
works correctly. Also fixed preferTypes to accept readonly arrays.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/systems/thoughtSystem.ts

@@ -166,7 +166,7 @@ function describeRecentEvents(
 
     const events = eventMemoryService.selectForPrompt(entityId, {
       maxCount: 5,
-      preferTypes: preferTypes as any,
+      preferTypes,
     });
     if (events.length > 0) {
       return events.map(e => `- ${e.detail}`).join('\n');