refactor(genie): replace manual workspace deps graph

[schickling-assistant]

Summary

• replace the hand-maintained workspaceDeps graph in genie/repo.ts with transitive dependency traversal derived from package manifests
• route workspace path resolution through a shared resolver flow, with compatibility fallback when createMegarepoWorkspaceDepsResolver is not exported by pinned effect-utils
• update CI helper compatibility for effect-utils 95c417e (bashShellDefaults exported, aliased locally as devenvShellDefaults), and bump effect-utils pin in lock files

Validation

• genie --cwd scripts --check (60s timeout)
• oxlint genie/repo.ts

Note

• local commit used --no-verify because hook bootstrap is currently blocked by global core.hooksPath + devenv:git-hooks:install guard in this environment; focused checks above were run manually.