SSO multi-IDP support

DeepSource now supports multiple teams sharing the same identity provider (IDP/Entity ID) for Single Sign-On. Users who have access to multiple IDPs will see a provider selection screen during login, making it easier to manage authentication across teams and organizations.

Fixes and Improvements

• Dashboard performance has been improved for teams with a large number of repositories.
• Fixed an issue with Bitbucket diff handling during merge conflicts.