fix(integration): improve guru integration

[hassan254-prog]

Describe your changes

• This change is necessary to properly handle pagination when processing nextPageLink in Guru. By using the updated base URL, the endpoint construction avoids redundancy.

Issue ticket number and link

Checklist before requesting a review (skip if just adding/editing APIs & templates)

• I added tests, otherwise the reason is:
• I added observability, otherwise the reason is:
• I added analytics, otherwise the reason is:

[khaliqgant]

We have to be careful with this for users who are using this in the proxy or scripts. This would be a breaking change that we need to announce etc.

[hassan254-prog]

I agree, we definitely need to handle this carefully to avoid disrupting users who rely on the proxy or scripts. Maybe we can check on the connections currently running in production environment.

[TBonnin]

there is only 12 existing guru integrations (including 4 in a prod environment) so it will definitely be a breaking change

[bodinsamuel]

We could have a second provider, not ideal though
We could introduce a patch props:

guru:
  proxy:
      base_url: https://api.getguru.com/api/v1
  patch
    20241022:
      base_url: https://api.getguru.com/

or the opposite to optimize for new integrations

guru:
  proxy:
      base_url: https://api.getguru.com
  patch
    20241022:
      base_url: https://api.getguru.com/api/v1

So in the code we could use patch depending on the created_at