T3-045: Mainnet deployment checklist

Track: 3 — Solana Phone / Web3
Section: Infrastructure & Testing (20h)
Status: [ ] Todo
Repo: backend-api
Branch: feature/T3-045-mainnet-deploy-checklist
Estimated Hours: 2h

Done When

Checklist: tree created, metadata uploaded, RPC configured, keypair secured, fee payer funded, monitoring set up

Notes

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