T3-019: Create NFT metadata JSON for each badge

Track: 3 — Solana Phone / Web3
Section: Phase C: NFT Achievement Badges (72h)
Status: [ ] Todo
Repo: backend-api
Branch: feature/T3-019-nft-metadata-json
Estimated Hours: 3h

Done When

Metaplex-compatible JSON metadata for each badge: name, symbol, description, image URI, attributes (tier, category, rarity)

Notes

No notes yet.