fix(webhooks): do not send duplicate webhooks

[Narayanbhat166]

Type of Change

• New feature

Description

Hyperswitch triggers a webhook only when it receives a webhook. We will need to trigger a webhook for payments too, but in that case, if we receive a webhook from upstream, that will also trigger a webhook to the merchant. To avoid this, event id is generated using primary_resource_id and event_type. This will prevent the same event type webhook being repeated.

Additional Changes

• This PR modifies the database schema

migrations/2023-08-01-165717_make_event_id_unique_for_events_table/down.sql
migrations/2023-08-01-165717_make_event_id_unique_for_events_table/up.sql

Motivation and Context

How did you test it?

• Create a payment and test if webhooks are received in the webhook site.

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed submitted code

[NishantJoshi00]

Looks good!