ci: align с altum pattern — runner mirror'ит Docker Hub

- Убраны префиксы repo.nstart.cloud/ — runner config (DOCKER_AUTH_CONFIG)
  обрабатывает pull из Docker Hub mirror автоматически
- DinD сервис: alias=docker, --tls=false, DOCKER_HOST=tcp://docker:2375
  (proven pattern из altum/.gitlab/ci/docker.yml)
- IMAGE_TAG = ref-slug + sha (как у altum)
- BUILDKIT_INLINE_CACHE=1 для cache-from optimization
- Dockerfiles: FROM maven/eclipse-temurin/liquibase без префиксов

ordinis-app/Dockerfile

@@ -1,5 +1,5 @@
 # Multi-stage build для ordinis-app
-FROM repo.nstart.cloud/maven:3.9.9-eclipse-temurin-21 AS build
+FROM maven:3.9.9-eclipse-temurin-21 AS build
 WORKDIR /build
 COPY pom.xml ./
 COPY ordinis-domain ./ordinis-domain
@@ -14,7 +14,7 @@ COPY ordinis-migrations ./ordinis-migrations
 COPY ordinis-app ./ordinis-app
 RUN mvn -B -pl ordinis-app -am package -DskipTests
 
-FROM repo.nstart.cloud/eclipse-temurin:21-jre
+FROM eclipse-temurin:21-jre
 WORKDIR /app
 COPY --from=build /build/ordinis-app/target/*.jar /app/app.jar
 EXPOSE 8080