Introduce thin Maven Profile for Minimal Runtime Distribution

[manel-martos]

Build Modernization — Introduce thin Maven Profile for Minimal Runtime Distribution

Background

The current cdm-java (rosetta-source) distribution bundles a significant volume of supplemental resources into the primary runtime artifact. This results in an artifact size of approximately 65 MB in Maven Central, which leads to unnecessary memory overhead and an expanded security surface area in production and cloud-native environments.

By decoupling the core generated model logic from these supplemental files, this PR provides a "Thin JAR" alternative that improves deployment efficiency, reduces class-loading times, and simplifies security compliance audits.

What is being released?

• Introduction of the thin Maven Profile: An opt-in build configuration that generates a lean runtime artifact.
• Secondary Artifact with Maven Classifier: Implementation of the thin classifier, allowing the build to generate a secondary, lean JAR (e.g., cdm-java-thin.jar) alongside the standard distribution ensuring full backward compatibility for existing pipelines.
• Targeted Resource Exclusions: The following resources are excluded from the thin artifact to minimize bloat:

<excludes>
    <exclude>build-resources/**</exclude>
    <exclude>cdm-sample-files/**</exclude>
    <exclude>config/**</exclude>
    <exclude>functions/**</exclude>
    <exclude>ingest/**</exclude>
    <exclude>ingestions/**</exclude>
    <exclude>mapping-analytics/**</exclude>
    <exclude>release/**</exclude>
    <exclude>result-json-files/**</exclude>
    <exclude>schemas/**</exclude>
    <exclude>**/rosetta/*.rosetta</exclude>
</excludes>

Review Directions

Maintainers and users can verify the build locally by running:
mvn clean install -Pthin -DskipTests

This should produce both the standard JAR and the new -thin.jar artifact in the target directory and local .m2 repository.

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