feat: add retired information to contract agreement api

[ndr-brt]

What

Adds a /contractagreement/request-enhanced endpoint, that behaves in the same exact way /contractagreement/request does plus adding information about eventual retirement.

This will make the frontend snappier because there won't be the need to do 2 calls anymore.

Attributes added:

• isRetired: boolean
• retiredAt: number
• retirementReason: string

How

It looks a bit hacky, but what I did is:

• inject contract negotiation store in the retirement store in order to:
  • being able to query agreements and join the retirement table
  • set the same "mapping" needed to query the agreements
• add the query agreements method on the retirement service
• create a transformer for the EnhancedAgreement that uses the original ContractAgreement transformer
• Add a new endpoint controller

Notes

• The transferCount information has not been added yet, because it would require an additional chunk of work.
  Let's validate this first and do the rest later.
• "enhanced agreements" is not a really good name, but any advice will be appreciated