Setting the property `version.ai.timefold.solver` can lead to inconsistencies in the dependencies

[zepfred]

Setting version.ai.timefold.solver to 999-SNAPSHOT while the parent version remains on a different version may lead to inconsistencies in the dependency graph.

    <parent>
        <groupId>ai.timefold.solver</groupId>
        <artifactId>timefold-solver-service-parent</artifactId>
        <!--
          Parent version must be the first <version> in the pom file due to release workflow.
          Do not use version property for parent version as it's not supported by Dependabot.
         -->
        <version>2.4.0-rc-1</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <groupId>ai.timefold.model</groupId>
    <artifactId>timefold-field-service-routing</artifactId>
    <version>${revision}</version>
    <name>Timefold Field Service Routing model</name>

    <!-- Please see .mvn/maven.config for Timefold Model SDK profiles activated by default. -->
    <properties>
        <revision>999-SNAPSHOT</revision>
        <model.api.version>v1</model.api.version>
        <version.org.locationtech.jts>1.20.0</version.org.locationtech.jts>
        <version.org.jgrapht>1.5.3</version.org.jgrapht>
        <!-- if needed, override defaults from timefold-models-sdk-model-parent -->
        <maven.compiler.release>25</maven.compiler.release>
        <!-- to avoid warning in tests due to Mockito's ByteBuddy -->
        <argLine>-XX:+EnableDynamicAgentLoading</argLine>
        <version.ai.timefold.solver>999-SNAPSHOT</version.ai.timefold.solver>
    </properties>