dokkaPackagePrefix
Package prefix combined with dokkaBuildProvenanceModuleName and the viewpoint name to identify report assets uniquely across modules. Package includes use the module's source package directories, independently of its Gradle path.
Example: "app" for a module with dokkaModuleName activities.aeb.X and viewpoint analysis produces report asset prefix app.activities.aeb.X.analysis.
Empty/unset means no prefix (module-name + viewpoint only).