feat: update database schema and configuration for Flyway integration and refactor table names

build.gradle.kts

@@ -47,6 +47,8 @@ dependencies {
     implementation(libs.spring.boot.starter.security)
     implementation(libs.spring.boot.starter.jpa)
     implementation(libs.mybatis.starter.core)
+    implementation(libs.flyway.core)
+    implementation(libs.flyway.postgresql)
     implementation(libs.jackson.jsr310)
     testImplementation(libs.spring.boot.starter.test)
     testImplementation(libs.reactor.test)