What are Hibernate 7's improvements to multi-tenancy support?

// DISCRIMINATOR (most common in Hibernate 7)
@FilterDef(
    name="tenantFilter",
    parameters=@ParamDef(name="tenantId", type=String.class),
    autoEnabled=true  // Hibernate 7: auto-enabled!
)
@Filter(name="tenantFilter", condition="tenant_id = :tenantId")
@Entity
public class Order {
    @Id private Long id;
    private String tenantId;  // discriminator column
    private BigDecimal total;
}

// FilterDefContributor SPI: auto-resolves tenantId from ThreadLocal
public class TenantFilterContributor implements FilterDefContributor {
    @Override
    public void contribute(FilterDefTarget target) {
        target.registerFilterDefinition(
            FilterDefinition.of("tenantFilter",
                Map.of("tenantId", TenantContext::getCurrentTenantId))
        );
    }
}

// DATABASE strategy: supply different connections per tenant
public class TenantConnectionProvider implements MultiTenantConnectionProvider<String> {
    @Override
    public Connection getConnection(String tenantId) {
        return dataSourceMap.get(tenantId).getConnection();
    }
}