"QuerySyntaxException: l'utilisateur n'est pas mappé" lors de l'ajout d'une entité à partir d'un autre package

J'ai créé un projet maven de configuration Hibernate (construit avec le plug-in maven-shade-plugin) pour permettre à ma base de code d'utiliser une "classe de base de données" unifiée. Cependant, la classe ne semble pas mapper (lève une exception org.hibernate.hql.internal.ast.QuerySyntaxException: l'utilisateur n'est pas mappé au moment de l'exécution) lorsqu'elle est appelée depuis l'extérieur du projet en cours d'exécution.

Lorsqu'il est exécuté dans le projet, tout fonctionne correctement. Cependant, Hibernate ne parvient pas à mapper l'entité lorsqu'elle est exécutée depuis l'extérieur du projet.

CommonDB.java (partie du package maven meta1203-data)

Sep 07, 2019 2:36:13 AM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {[WORKING]}
Sep 07, 2019 2:36:13 AM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
Sep 07, 2019 2:36:13 AM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {5.0.4.Final}
Sep 07, 2019 2:36:14 AM org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
Sep 07, 2019 2:36:14 AM org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl getIsolatedConnection
INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess@329dbdbf] for (non-JTA) DDL execution was not in auto-commit mode; the Connection 'local transaction' will be committed and the Connection will be set into auto-commit mode.
Sep 07, 2019 2:36:14 AM org.hibernate.hql.internal.QueryTranslatorFactoryInitiator initiateService
INFO: HHH000397: Using ASTQueryTranslatorFactory
Exception in thread "main" java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: User is not mapped [select u from User u where u.username = :id]
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:138)
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:181)
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:188)
    at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:729)
    at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:745)
    at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:104)
    at com.meta1203.microservices.CommonDB.findOneBy(CommonDB.java:72)
    at com.meta1203.microservices.user.TestDB.main(TestDB.java:12)
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: User is not mapped [select u from User u where u.username = :id]
    at org.hibernate.hql.internal.ast.QuerySyntaxException.generateQueryException(QuerySyntaxException.java:79)
    at org.hibernate.QueryException.wrapWithQueryString(QueryException.java:103)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:219)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:143)
    at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:119)
    at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
    at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:153)
    at org.hibernate.internal.AbstractSharedSessionContract.getQueryPlan(AbstractSharedSessionContract.java:611)
    at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:720)
    ... 4 more
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: User is not mapped
    at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:169)
    at org.hibernate.hql.internal.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:91)
    at org.hibernate.hql.internal.ast.tree.FromClause.addFromElement(FromClause.java:79)
    at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:331)
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3695)
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3584)
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:720)
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:576)
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:313)
    at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:261)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:271)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:191)
    ... 10 more

TestDB.java (partie du package maven meta1203-userservice)

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.meta1203</groupId>
    <artifactId>meta1203-services</artifactId>
    <packaging>pom</packaging>
    <version>0.0.1</version>

    <properties>
        <java.version>1.8</java.version>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-lambda-java-core</artifactId>
            <version>1.2.0</version>
        </dependency>
        <dependency>
            <groupId>com.meta1203</groupId>
            <artifactId>meta1203-data</artifactId>
            <version>0.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.3.11.Final</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.36</version>
        </dependency>
    </dependencies>
    <modules>
        <module>meta1203-userservice</module>
    </modules>
</project>

User.java (partie du package maven meta1203-userservice)

package com.meta1203.microservices.user.model;

import java.util.Set;

import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.Table;

import com.meta1203.microservices.BaseEntity;

@Entity
@Table(name = "users")
public class User extends BaseEntity {
    private String username;

    private String textNotificationList;
    private String emailNotificationList;

    @ElementCollection
    private Set<Long> ignoredAlerts;
    @ElementCollection
    private Set<Long> clients;

    // to be parsed with DateTimeFormatter.ISO_OFFSET_DATE_TIME
    private String lastItineraryUpdate;

     // getters and setters
}

pom.xml du parent

package com.meta1203.microservices.user;

import com.meta1203.microservices.CommonDB;
import com.meta1203.microservices.user.model.User;

public class TestDB {
    public static void main(String[] args) {
        TestDB tdb = new TestDB();
        CommonDB<User> db = new CommonDB<User>(User.class);
        db.open();

        User hunter = db.findOneBy("username", "hunter");
        System.out.println(hunter.getUsername());
        System.out.println(db.countBy("username", "hunter"));

        db.close();
    }
}

package com.meta1203.microservices;

import java.util.List;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class CommonDB <C extends BaseEntity> {
    private Configuration cfg;
    private SessionFactory sf;
    private Session session;
    private Class<C> c;

    public CommonDB(Class<C> anoClass) {
        String jdbcUrl = String.format(
                "jdbc:mysql://%s/%s",
                System.getenv("DB_URL"),
                System.getenv("DB_NAME"));

        cfg = new Configuration()
                .setProperty("hibernate.connection.url", jdbcUrl)
                .setProperty("hibernate.connection.username", System.getenv("DB_USERNAME"))
                .setProperty("hibernate.connection.password", System.getenv("DB_PASSWORD"))

                .setProperty("hibernate.connection.driver_class", "com.mysql.jdbc.Driver")
                .setProperty("hibernate.connection.pool_size", "1")
                .setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect")
                .setProperty("hibernate.hbm2ddl.auto", "update")
                .setProperty("hibernate.show_sql", "true")
                .addAnnotatedClass(anoClass.getClass());

        c = anoClass;
    }

    public void open() {
        sf = cfg.buildSessionFactory();
        session = sf.openSession();
    }

    public void close() {
        session.close();
        sf.close();
    }

    public C findOneBy(String field, String o) {
        String query = "select u from " + c.getSimpleName() + " u where u." + field + " = :id";

        return session.createQuery(query, c).setParameter("id", o).getSingleResult();
    }
 // other CRUD functions
}