docs(v0.44): preserve Beta.2 closure verification evidence (#1314)

* docs(v0.44): preserve Beta.2 closure verification evidence (#1288)

Fresh-verifier closure report (NO_GO on F1 at aa3dd70), the remediation
re-verification addendum (GO at 89d3736), and the verifier-added
gate-teeth tests for the packed-artifact legacy-residue gate.

* docs(v0.44): role-neutral phrasing in Beta.2 closure evidence (#1288)

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Co-authored-by: DevBot <devbot@openelement.dev>

Author: SisyphusZheng