Mishti: change EAS & Verax attestation schema

[nutrina]

This request affects the following components:

• iam (for creating new payloads)
• eas-proxy (both EAS & Verax)

Depends on: #3187

Summary

• we will drop the current EAS schemas in favour of using only 1 attestation that will have the same structure as the score in the new V2 API, with some adjustments:
  • new field will be added score_id
• we will need to update the iam package to create the proper payloads
• the functionality should be off by default and enabled by the same feature flag as the one in Mishti: implement double hashing (iam, embed, infra) #3187
• the contracts in eas-proxy need to be adjusted:
  • we want the functions in the https://github.com/passportxyz/eas-proxy/blob/main/contracts/IGitcoinPassportDecoder.sol to remain backwards compatible with the old schemas as much as possible
    • the only exception will be the getPassport function which returns an array of Credential) for which we will only populate the provider field from now on
  • we might add other functions we consider important (like getStamps(), getStamps(scorer_id) , getFullScore(scorer_id)... these are just a few ideas at the moment)
• make adjustments for the Verax smart contracts & portal

Acceptance criteria

GIVEN I have a verified my stamps in the Passport app
WHEN I click the "Bring Passport onchain" button
THEN my current score is written to the blockchain as a EAS attestation
AND I can view the score, and related metadata (providers, weights, deduplication information) in the eAS explorer

GIVEN I have written my score on-chain
WHEN I refresh the passport application
AND I click on the "Mint onchain" button
THEN sidebar opens and the the onchain status displays that my on-chain score is up to date correctly displayed

GIVEN I have written my score on-chain
WHEN I refresh the passport application
AND I claim one more stamp and increase my score
AND I click on the "Mint onchain" button
THEN sidebar opens and the the onchain status is correctly displayed and indicates that my on-chain score is not up to date