Moves Corpora dir from packages/Harness/Corpora into packages/Harness/Sources/Harness/Corpora and updates the resource declaration from .copy("../../Corpora") to .copy("Corpora"). xcodebuild's strict package resolution was flagging the package-root location as unhandled despite the swift-test pattern working. Bundle.module layout unchanged; all call sites unaffected. 63/63 Harness tests pass locally.