[Feature]: Add SSO auto-login support for company domain users

[jaimarothiya18]

Is your feature request related to a problem?

• Currently, users need to be manually added to LogChef even when the organization uses SSO/OIDC authentication. For company domains (e.g., cars24.com), users should be automatically provisioned upon first login.
• Users must be manually added to LogChef before they can access the system
• Even with valid SSO credentials, users cannot login if they haven't been pre-provisioned

Describe the solution you'd like

• When a user from a configured company domain (e.g., cars24.com) authenticates via OIDC/SSO for the first time, they should be automatically provisioned in LogChef
• Auto-provisioned users should be assigned to a default team or role based on configuration
• Admins should be able to configure which domains are allowed for auto-provisioning
• Basically when user first time login with company email a user entry should created in DB and directly login to logchef and further team addition we can manage manually.

[auth.oidc]
auto_provision_enabled = true
allowed_domains = ["cars24.com", "example.com"]
default_team = "default"
default_role = "viewer"

Describe alternatives you've considered

No response

Additional context

No response

Importance

Nice to have

Contribution

No

[jaimarothiya18]

@mr-karan - can you please try to resolve this one, because currently user onboarding is quite difficult.

[mr-karan]

@jaimarothiya18 This is a valid feature request, but it's not something I'm planning to work on in the very near term. Maybe by the next release. In the meantime, auto-provisioning can be scripted externally (e.g., a small wrapper that calls the API to create users on first login).