[Grant Application] Zush - shielded ZEC spend path for cohort 0

## team **applicant:** frontier compute llc, wyoming **wyoming filing id:** 2026-001959115, filed 2026-04-23 **lead:** @Zk-nd3r ## review integrity note pr #285 was opened by an unrelated account and is not affiliated with zush, frontier compute, or this grant application. it doe