fix(repositories): Convert repository sync api to be a control endpoint

[wedamija]

This accesses a control task directly, so it has to be a control endpoint itsef.

Fixes SENTRY-5PB1

[sentry]

Bug: A non-numeric integration_id in the URL will cause a 500 error due to missing input validation from the new base class.
_{Severity: MEDIUM}

Suggested Fix

Re-implement the input validation for integration_id. Override the convert_args method in the endpoint to safely cast the integration_id to an integer, raising an Http404 if a ValueError occurs, mirroring the behavior of the previous base class.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent. Verify if this is a real issue. If it is, propose a fix; if not, explain why it's
not valid.

Location:
src/sentry/integrations/api/endpoints/organization_integration_repo_sync.py#L19-L20

Potential issue: Changing the base class to `OrganizationIntegrationBaseEndpoint`
removed the input validation for the `integration_id` URL parameter. Previously,
`convert_args` would safely cast the ID to an integer and raise an `Http404` on failure.
Now, if a non-numeric string is passed as `integration_id`, it is sent directly to the
database query `objects.get(id=integration_id)`. This causes the ORM to raise an
unhandled `ValueError`, resulting in a 500 Internal Server Error instead of a 404 Not
Found.

_{Did we get this right? 👍 / 👎 to inform future reviews.}