Add Microchipping events to the events resolver

[AzisK]

Goal
Add Microchipping events to the events resolver

pets-back/src/schema/resolvers/event.ts

Line 109 in da4a7f7

events: async (_, { animalId, groups }, { pgClient }) => {

Description
Right now the results for Microchipping events are mocked. Return them dynamically.

This issue is blocked by #244. This previous issue has to create a table and add some fake data to implement the retrieval of these events in the resolver.

Similar issue #246