mir-backend-jvm-micronaut

Make It Right (Micronaut module). Micronaut 5.x / 4.x + Micronaut Data + Micronaut Security + Netty footguns. Covers: compile-time DI and AOT (bean definitions are generated at build, but resolution is still runtime, so NoSuchBeanException/NonUniqueBeanException surfaces after startup because singletons are lazy), bean scope pitfalls (@Singleton default), blocking the Netty event loop…