[SERVICES-2315] Tokens query extra fields

[mad2sm0key]

Reasoning

• expose previous 7 days price, volume, liquidity and token creation date in tokens query

Proposed Changes

• add extra optional fields and resolvers to EsdtToken model : previous7dPrice, volumeUSD24h, liquidityUSD, createdAt
• allow custom intervals by using start and time arguments in getLatestCompleteValues timescaledb query
• add methods for computing the new fields using data from the analytics service and elastic search (for token creation timestamp)

How to test

query {
  tokens(identifiers: []) {
    identifier
    previous7dPrice
    volumeUSD24h
    liquidityUSD
    createdAt
  }
}