feat(logging): add structured audit logging with file export

- Add logback-spring.xml with daily rolling file appenders
- Add structured audit events to RequireRoleAspect
- Add logging export configuration to application.yaml
- Add janino dependency for logback evaluation
- Ignore /log/ export directory

build.gradle.kts

@@ -37,6 +37,7 @@ dependencies {
     implementation("io.jsonwebtoken:jjwt-api:0.13.0")
     runtimeOnly("io.jsonwebtoken:jjwt-impl:0.13.0")
     runtimeOnly("io.jsonwebtoken:jjwt-jackson:0.13.0")
+    runtimeOnly("org.codehaus.janino:janino")
     testImplementation("org.springframework.boot:spring-boot-starter-test")
     testImplementation("org.jetbrains.kotlin:kotlin-test-junit5")
     testRuntimeOnly("org.junit.platform:junit-platform-launcher")