Update copy for GitHub app in PR comment

[codecovdesign]

Problem to solve

The PR comment shows a GitHub app warning – that is a bit outdated (May 15th).

Solution

• Investigate where/how this message appears
• Update copy to be more clear, if org GitHub app isn't installed
  • something like "Your organization needs to install the Codecov GitHub app to enable full functionality."
    • links to: https://github.com/apps/codecov/installations/select_target
      OR

TBD, alternative: remove message from PR comment

[codecovdesign]

another report: codecov/feedback#8 (comment)
looks like the app was already installed for the user, but the message was still shown

[scott-codecov]

The only condition under which we display this message is if repo owner's integration_id is null: https://github.com/codecov/worker/blob/8012c86931021e5c39df7f5ae9a8ec9db1f33cee/services/notification/notifiers/mixins/message/__init__.py#L166-L173

Looking at the code I see the following log line emitted after we save the integration_id (in the webhook handler): https://github.com/codecov/codecov-api/blob/958cfcf1d3ec092371ba4c9cae0020c33a1bf624/webhook_handlers/views/github.py#L424

Searching for that log line in GCP only yields a single result on 9/3/2023:
https://l.codecov.dev/EELWfJ. And subsequent PRs in that same repo no longer display the warning.

We must have missed the original webhook to install the app for CLIENT. This must be a fairly common occurrence since we already have a task to ask for missed webhooks and request redelivery: https://github.com/codecov/worker/blob/main/tasks/github_app_webhooks_check.py

There's been talk about rebuilding some of the infrastructure around webhooks in hopes of missing fewer requests. Aside from that I'm not entirely sure what else to do at this point.

[scott-codecov]

I will make a PR with the copy change suggested above though.