ENSAnalytics endpoints with detailed statistics for a specific address

[Goader]

Background:

• ENS Holiday Awards needs a "Referrer Detail" page, that will display the referrals statistics for a given address.
• Follows feat: introduce ENSAnalytics API into ENSApi #1239
• It is now unblocked with feat(ensindex): introduce registrars plugin #1249 already merged into main.

Subtasks:

• Implement API powering the header section of "Referrer Detail" page:
  • What is the sum total count of referrals made by the user?
  • What is the sum total incremental duration (in seconds) of all the referrals they made (use our type alias Duration)?
  • What is their "Referrer Score"? Please note the definition of this term here.
  • What is the total sum "Referrer Score" for ALL referrers (not just the user).
  • What is their "Referrer Contribution"? Please note the definition of this term here.
  • What is their "Referrer Award Pool Share" in USD? This is measured as their "Referrer Contribution" * $10,000 USD. Use type alias PriceUsdc for this. Note that it is a bigint and 1 represents a fraction of a coin.

[lightwalker-eth]

Completed through #1318