test(model-server): integration tests that run postgres using docker-compose

To test the ignite configuration for postgres and also the schema
migrations we need an actual database.

Author: slisson

model-server-test/README.md

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+This project tests the PostgreSQL based Ignite configuration of the model-server
+by starting a database instance in docker.

model-server-test/build.gradle.kts

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+plugins {
+    kotlin("jvm")
+    alias(libs.plugins.docker.compose)
+}
+
+dependencies {
+    testImplementation(kotlin("test"))
+    testImplementation(project(":model-server"))
+}
+
+tasks.test {
+    doFirst {
+        val db = dockerCompose.servicesInfos.getValue("db")
+        systemProperty("jdbc.url", "jdbc:postgresql://${db.host}:${db.port}/")
+    }
+}
+
+dockerCompose {
+    isRequiredBy(tasks.test)
+    setProjectName("model-server-test-started-from-gradle")
+}

model-server-test/docker-compose.yaml

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+services:
+  db:
+    image: postgres:16.2
+    volumes:
+      - ./legacy-database.sql:/docker-entrypoint-initdb.d/initdb.sql
+    environment:
+      - POSTGRES_PASSWORD=modelix
+      - POSTGRES_USER=modelix
+      - POSTGRES_DB=modelix
+    ports:
+      - 5432