feat: 支持通过Flyway自动初始化数据库

- 将 starter 初始化脚本迁移到 db/migration，并保留 V1-V3 作为首批迁移

- 清理旧 sql/initdb 挂载与历史分段 SQL，避免 Docker 启动时重复导库

- 更新 README、应用配置和中间件编排，统一空库启动方式

easyflow-starter/easyflow-starter-all/src/main/resources/application.yml

@@ -18,13 +18,19 @@ spring:
     timeout-per-shutdown-phase: 30s
   datasource:
     # ！！！ 注意：useInformationSchema=true 是必须的，用于支持 MyBatis-Flex 正确读取表注释。
-    url: jdbc:mysql://127.0.0.1:23306/easyflow?useInformationSchema=true&characterEncoding=utf-8
+    url: jdbc:mysql://127.0.0.1:33306/easyflow?useInformationSchema=true&characterEncoding=utf-8
     username: root
     password: root
+  flyway:
+    enabled: true
+    locations: classpath:db/migration
+    baseline-on-migrate: false
+    validate-on-migrate: true
+    clean-disabled: true
   data:
     redis:
       host: 127.0.0.1
-      port: 6379
+      port: 36379
       database: 0
       password: ${REDIS_PASSWORD:123456}
       timeout: 5s
@@ -106,11 +112,11 @@ dromara:
     minio:
       - platform: minio-1
         enable-storage: true
-        access-key: ${MINIO_ACCESS_KEY:easyflowadmin}
-        secret-key: ${MINIO_SECRET_KEY:easyflowadmin123}
-        end-point: ${MINIO_ENDPOINT:http://127.0.0.1:9000}
-        bucket-name: ${MINIO_BUCKET:easyflow}
-        domain: ${MINIO_DOMAIN:http://127.0.0.1:9000/easyflow/}
+        access-key: easyflowadmin
+        secret-key: easyflowadmin123
+        end-point: http://127.0.0.1:39000
+        bucket-name: easyflow
+        domain: http://127.0.0.1:9000/easyflow/
         base-path: attachment
 
 # 自定义节点相关配置