[Feature]: Add an API to retrieve a proposal's transaction hash when given any object (like a MarketID)

[gordsport]

Feature Overview

Currently with the APIs as they stand today it is possible to have a txhash and from that be able to find the thing/object that it relates to e.g., order, transfer etc..

However, in the following front end issue comment it is required that its able to be queried in reverse i.e., given a thing/object we can find the associated txhash

In order to be able to find a txhash from a thing/object
We will add an API that allows searching in this way in addition to the current approach
So that the user journey in the linked FE issue can be implemented

Linked FE issue:

• View successor markets frontend-monorepo#4175

duplicated issue for info:

• [Feature]: Add an API to retrieve a proposal's transaction hash when given any object (like a MarketID) #8687 (comment)