Add indexes for NFTs efficient queries

[nicov-iov]

This pull request updates the database schema to improve support for NFTs by adding new indexes to the event table. These changes are reflected in both the raw SQL schema and the Prisma schema definition, which will help optimize queries related to NFT events.

NFT support and indexing improvements:

• Added three new indexes to the event table in both prisma/rsk-explorer-database.sql and prisma/schema.prisma to optimize queries for NFT-related data:
  • Index on (address, topic0, topic3, block_number DESC, log_index DESC) to speed up lookups involving NFT transfer events. [1] [2]
  • Index on (topic0, topic1) to optimize event queries by topic. [1] [2]
  • Index on (topic0, topic2) for further event filtering efficiency. [1] [2]

Documentation:

• Updated database schema version and notes to reflect the addition of NFT-related indexes.

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

OpenSSF Scorecard

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Scanned Files

[Copilot]

Pull request overview

Adds support for persisting ERC-721 token metadata by introducing an nft_metadata model to the Prisma schema (intended to correspond to a new nft_metadata table in Postgres).

Changes:

• Add nft_metadata Prisma model with composite primary key (contract, tokenId)
• Map select camelCase fields to snake_case DB columns (token_id, token_uri, fetched_at)

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