build: upgrade Agent Bundle to verified 57a9196 preview (#14)

* chore: bump agent-bundle to e57c0ac9 pkg.pr.new

Pin the live agent-bundle preview so install consumers stay on the
agent-bundle-artifact branch and node ./install.mjs.

Co-authored-by: Zack Jackson <ScriptedAlchemy@users.noreply.github.com>

* build: pin verified Agent Bundle host inventory build

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Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Zack Jackson <ScriptedAlchemy@users.noreply.github.com>

Author: ScriptedAlchemy