feat: 添加SQLite数据库支持并迁移数据转换脚本

- 新增init_sqlite.py脚本，用于将MySQL转储文件转换为SQLite数据库
- 实现MySQL到SQLite的语法转换，包括数据类型映射、表结构清理等功能
- 在pom.xml中替换MySQL驱动为SQLite驱动，并添加JDBC依赖
- 更新application.yml配置文件，切换数据库连接从MySQL到SQLite
- 配置HikariCP连接池参数以适配SQLite数据库特性

src/main/resources/application.yml

@@ -2,12 +2,22 @@ server:
   port: 9090
 
 # 数据库配置
+# MySQL原始配置
+#spring:
+#  datasource:
+#    driver-class-name: com.mysql.cj.jdbc.Driver
+#    username: root
+#    password: 123456
+#    url: jdbc:mysql://localhost:3306/psychologicaltreatment?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&serverTimezone=GMT%2b8&allowPublicKeyRetrieval=true
+
+# SQLite
 spring:
   datasource:
-    driver-class-name: com.mysql.cj.jdbc.Driver
-    username: root
-    password: 123456
-    url: jdbc:mysql://localhost:3306/psychologicaltreatment?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&serverTimezone=GMT%2b8&allowPublicKeyRetrieval=true
+    driver-class-name: org.sqlite.JDBC
+    url: jdbc:sqlite:psychologicaltreatment.db
+    hikari:
+      maximum-pool-size: 1
+      minimum-idle: 1
   servlet:
     multipart:
       max-file-size: 100MB