Simplify Lokksmith integration

server/build.gradle.kts

@@ -17,6 +17,10 @@ kotlin {
     }
 }
 
+tasks.test {
+    useJUnitPlatform()
+}
+
 application {
     mainClass.set("dev.ulfrx.recipe.ApplicationKt")
 
@@ -36,7 +40,6 @@ dependencies {
     implementation(libs.postgresql)
     implementation(projects.shared)
 
-    // Phase 2: Ktor auth + JWT validation + observability (D-21..D-23).
     implementation(libs.ktor.serverAuth)
     implementation(libs.ktor.serverAuthJwt)
     implementation(libs.ktor.serverCallLogging)
@@ -49,10 +52,8 @@ dependencies {
     implementation(libs.hikari)
 
     testImplementation(libs.ktor.serverTestHost)
-    testImplementation(libs.kotlin.testJunit)
+    testImplementation(libs.kotlin.testJunit5)
 
-    // Phase 2: Testcontainers for JIT user provisioning + JWT auth integration tests
-    // (AUTH-03, AUTH-06). Wired here so Plan 02-02 only needs to write tests.
     testImplementation(libs.testcontainers.postgresql)
     testImplementation(libs.testcontainers.junit.jupiter)
 }