Customer release bundle includes the runtime, docs, and deployment assets

Customers now receive a single release bundle with the CoreIQ JAR, changelog, install instructions, server deployment files, product documentation, API reference, mainframe deployment files, JCL templates, and Db2 schema assets. The packaging removes duplicated copies and takes generated files from their source of truth at build time. [[feature:customer-release-bundle|Customer release bundle]] makes installation and upgrade materials easier to find and keep consistent.