Integrate installer source ee2a3bd78079b4ca1dc41e9202abf0fc0306324a over the lifecycle layer, including the exact owner-approved Install spec policy paragraph. The two supplied lifecycle classification rows were already carried in the preceding commit and are not duplicated.
Use the existing dependency owner for exact resources, explicit source/postinstall actions and retained caches. Share exact byte delivery with the engine caller, and preserve literal Go/Deno arguments, permissions, exit status and process lifetime.
Validation: 31 real resource/build/runtime/cancel/binary controls passed, with unchanged Ruby execution skipped because its runtime is absent; 88 dependency/engine/payload neighbors passed. Whole-tree Ruff F, size, inventories and domains passed. No live installation or shared packages changed.
