Initial commit: LMS microservices scaffold

- Gradle multi-module: libs/{common-http,security-jwt,markdown,test-support},
  services/{identity,academic,progress,gateway}, web (Thymeleaf+htmx)
- identity-service: JWT auth (RSA), accounts, students, groups, enrollment,
  import from XLSX/CSV, credentials export, password reset
- academic-service: lab import from JSON/zip (markdown + YAML + variants),
  levels, API
- progress-service: schema for student levels and variant assignments
- gateway: Spring Cloud Gateway, JWT validation, route propagation
- web: Server-side UI with flex/footer layout, light/dark theme toggle,
  admin dashboard, groups CRUD, student portal placeholder
- docker-compose: PostgreSQL 18
- Tests: identity smoke test with Testcontainers

libs/test-support/build.gradle.kts

@@ -0,0 +1,13 @@
+plugins {
+    id("lms.spring-library")
+}
+
+dependencies {
+    implementation(platform(libs.springBootBom))
+
+    // Shared integration-test infrastructure. Consumers add this module as testImplementation.
+    api(libs.springBootTestcontainers)
+    api(libs.testcontainersPostgresql)
+    api(libs.testcontainersJunitJupiter)
+    api(libs.springBootStarterTest)
+}

libs/test-support/src/main/kotlin/ru/ysu/lms/test/DatabaseTestSupport.kt

@@ -0,0 +1,8 @@
+package ru.ysu.lms.test
+
+object DatabaseTestSupport {
+    const val POSTGRES_IMAGE: String = "postgres:18"
+    const val SCHEMA_IDENTITY: String = "identity"
+    const val SCHEMA_ACADEMIC: String = "academic"
+    const val SCHEMA_PROGRESS: String = "progress"
+}