turborepo

a4b943e3 - fix: Retain microfrontend proxy tasks when using `filterUsingTasks` (#12545)

fix: Retain microfrontend proxy tasks when using `filterUsingTasks` (#12545) ## Summary - Fixes microfrontend child packages not running when `filterUsingTasks` future flag is enabled - The `with` field (used by MFE to co-schedule proxy tasks alongside dev tasks) creates no graph edges in the task graph — only BFS traversal queue entries during engine building. When `retain_filtered_tasks` prunes the engine via forward DFS on edges, these edge-less siblings get dropped, killing the MFE proxy. - Adds `expand_with_siblings` to transitively include all `with` siblings in the retained task set before pruning - Adds integration tests for `$TURBO_ROOT$` inputs through the task filter path ## How to test Given an MFE config in package `web` with child app `docs`: ``` turbo run dev --filter=docs ``` With `filterUsingTasks: true` in turbo.json future flags, `web#proxy` should now be retained alongside `docs#dev`.