Use official sbt runner #308
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This replaces the buildpack's custom sbt launcher implementation with the official sbt runner distribution from GitHub releases.
Previously, the buildpack downloaded only the
sbt-launch.jarand created a custom wrapper script. Now it downloads and uses the complete official sbt distribution (sbt-{version}.tgz) which includes the officialsbtrunner script.The runner version is pinned to
1.11.7for caching consistency across all projects, but this is independent of each project's actual sbt version specified inbuild.properties. The runner automatically downloads and executes the correct sbt version for each project.This change improves dev/prod parity since developers typically use the official sbt runner locally, and now the buildpack uses the same official distribution.
GUS-W-20413045