feat: add interview-prep topic group with 250 questions (6 subtopics, 5 question types)

Subtopics:
- distributed-microservice: 45 questions (分布式微服务架构)
- message-queue: 45 questions (消息队列)
- k8s-observability: 45 questions (K8s与可观测性)
- go-java-concurrency: 45 questions (Go/Java并发模型)
- database-advanced: 35 questions (数据库进阶)
- ai-engineering: 35 questions (AI工程实践)

Question types: single_choice, true_false, fill_blank, short_answer, code_reading

topics/interview-prep/message-queue/meta.json

@@ -0,0 +1,25 @@
+{
+  "slug": "message-queue",
+  "name": "消息队列",
+  "description": "主流中间件选型、路由、持久化原理、事务、死信队列、推拉模式、集群化部署",
+  "tags": [],
+  "question_files": {
+    "single_choice": "single_choice.json",
+    "true_false": "true_false.json",
+    "fill_blank": "fill_blank.json",
+    "short_answer": "short_answer.json",
+    "code_reading": "code_reading.json"
+  },
+  "stats": {
+    "total": 45,
+    "by_type": {
+      "single_choice": 15,
+      "true_false": 10,
+      "fill_blank": 10,
+      "short_answer": 5,
+      "code_reading": 5
+    }
+  },
+  "created": "2026-09-09",
+  "updated": "2026-09-09"
+}