feat: Maven multimodule scaffolding for Ordinis MDM service

- 10 модулей (domain, validation, events-api, outbox, rest-api, app, read-api, projection-writer, cuod-bundle, migrations)
- Parent pom + BOM с Spring Boot 3.4.2, Spring Cloud 2024.0.0, Vault Config 4.2.0
- ordinis-app: Spring Boot main с Actuator/Prometheus/Logstash JSON encoder/OpenTelemetry/Cloud Config/Vault skeleton
- ordinis-migrations: Liquibase changelogs (dictionary_definitions/records, audit_log, outbox_events, idempotency_keys, EXCLUSION CONSTRAINT через btree_gist)
- Multi-stage Dockerfiles для app и migrations

ordinis-migrations/pom.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>cloud.nstart.terravault.ordinis</groupId>
+    <artifactId>ordinis-parent</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>ordinis-migrations</artifactId>
+  <packaging>jar</packaging>
+  <name>Ordinis :: Migrations</name>
+  <description>Liquibase changelogs для Helm pre-upgrade Job. Собирается в отдельный Docker image (без Spring Boot).</description>
+
+  <build>
+    <resources>
+      <resource>
+        <directory>src/main/resources</directory>
+      </resource>
+    </resources>
+  </build>
+</project>