refactor: reorganize interview files and fix errors

Changes:
- Fixed CAP theory typo: "CP、AP、AP" → "CP、AP、CA"
- Reorganized file classifications for better structure:
  * Moved 4 database-related files from 01-分布式系统 to 02-数据库
  * Moved ConcurrentHashMap from 03-缓存 to 05-并发编程
  * Renamed 消息队列（RocketMQ_Kafka）.md → 消息队列_RocketMQ_Kafka.md
- Updated project overview with new structure (73 files, 15 categories)
- Database category now has 6 files (more cohesive)
- Concurrency category now has 5 files (better organized)

File movements:
- 事务隔离级别.md: 01-分布式系统 → 02-数据库
- 数据库锁机制.md: 01-分布式系统 → 02-数据库
- 分库分表.md: 01-分布式系统 → 02-数据库
- MySQL主从延迟.md: 01-分布式系统 → 02-数据库
- ConcurrentHashMap原理.md: 03-缓存 → 05-并发编程

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

.obsidian/workspace.json

@@ -196,6 +196,14 @@
   },
   "active": "fcbc762a80282002",
   "lastOpenFiles": [
+    "00-项目概述/项目概述.md",
+    "00-项目概述",
+    "questions/04-消息队列/消息队列_RocketMQ_Kafka.md",
+    "questions/05-并发编程/ConcurrentHashMap原理.md",
+    "questions/02-数据库/MySQL主从延迟.md",
+    "questions/02-数据库/分库分表.md",
+    "questions/02-数据库/数据库锁机制.md",
+    "questions/02-数据库/事务隔离级别.md",
     "questions/14-Web3与区块链/Golang与区块链开发.md",
     "questions/02-数据库/MyBatis核心原理.md",
     "questions/02-数据库/MySQL索引优化.md",
@@ -216,16 +224,8 @@
     "questions/01-分布式系统/分布式锁.md",
     "questions/14-Web3与区块链/README.md",
     "questions/14-Web3与区块链/简历项目Web3迁移.md",
-    "questions/14-Web3与区块链/跨链技术.md",
-    "questions/14-Web3与区块链/Layer2扩容方案.md",
-    "questions/14-Web3与区块链/高并发在区块链中的应用.md",
-    "questions/14-Web3与区块链/智能合约安全.md",
-    "questions/14-Web3与区块链/DeFi协议与AMM.md",
-    "questions/14-Web3与区块链/Web3基础知识.md",
     "questions/14-Web3与区块链",
-    "questions/01-分布式系统/分布式事务.md",
     "12-面试技巧",
-    "00-项目概述",
     "08-算法与数据结构",
     "questions/13-Golang语言",
     "questions/12-面试技巧",