Add debugBackend module with database and security setup

Introduced a new `debugBackend` module to support debugging and development tasks. This includes configuration for PostgreSQL, Redis, Hibernate, Spring Boot, and a basic security setup. Also added required entities, repositories, and runtime hints for SnapAdmin integration.

debugBackend/build.gradle.kts

@@ -0,0 +1,76 @@
+plugins {
+    kotlin("jvm") version "2.1.10"
+    kotlin("plugin.spring") version "2.1.10"
+    id("org.hibernate.orm") version "6.5.2.Final"
+    id("org.springframework.boot") version "3.4.5"
+    id("io.spring.dependency-management") version "1.1.7"
+    id("org.graalvm.buildtools.native") version "0.10.5"
+}
+
+group = "space.mori.dalbodeule"
+version = "0.5.1"
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+}
+
+hibernate {
+    enhancement {
+        enableAssociationManagement.set(false)
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation("org.springframework.boot:spring-boot-starter-actuator")
+    implementation("org.springframework.boot:spring-boot-starter-batch")
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+    implementation("org.springframework.boot:spring-boot-starter-data-redis")
+    implementation("org.springframework.boot:spring-boot-starter-security")
+    implementation("org.jetbrains.kotlin:kotlin-reflect")
+    implementation("org.springframework.boot:spring-boot-starter-websocket")
+    implementation("org.springdoc:springdoc-openapi-starter-webmvc-ui:2.8.6")
+
+    implementation("io.swagger.core.v3:swagger-core:2.2.30")
+    implementation("io.swagger.core.v3:swagger-annotations:2.2.30")
+
+    implementation("io.github.cdimascio:dotenv-kotlin:6.4.1")
+
+    developmentOnly("org.springframework.boot:spring-boot-docker-compose")
+    runtimeOnly("org.postgresql:postgresql:42.7.4")
+
+    implementation("jakarta.xml.bind:jakarta.xml.bind-api:4.0.2")
+    implementation("javax.xml.bind:jaxb-api:2.3.1")
+
+    // HTTP 클라이언트
+    implementation("org.springframework.boot:spring-boot-starter-webflux")
+
+    implementation(rootProject)
+
+    testImplementation("org.springframework.boot:spring-boot-starter-test")
+    testImplementation("org.jetbrains.kotlin:kotlin-test-junit5")
+    testImplementation("org.springframework.batch:spring-batch-test")
+    testImplementation("org.springframework.security:spring-security-test")
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+
+    testImplementation(kotlin("test"))
+}
+
+tasks.named<org.springframework.boot.gradle.tasks.run.BootRun>("bootRun") {
+    systemProperty("spring.profiles.active", "dev")
+}
+
+kotlin {
+    compilerOptions {
+        freeCompilerArgs.addAll("-Xjsr305=strict")
+    }
+}
+
+tasks.withType<Test> {
+    useJUnitPlatform()
+}