OAuthProxy accepts enable_cimd to control CIMD (Client ID Metadata Document) support, but none of the concrete provider subclasses exposed it — so the only way to disable CIMD was reaching into private internals after construction.

This adds enable_cimd: bool = True to the __init__ of AzureProvider, GitHubProvider, GoogleProvider, DiscordProvider, and WorkOSProvider, forwarding it through to super().__init__(). (OIDCProxy already had it.)

auth = AzureProvider(
    client_id="...",
    client_secret="...",
    tenant_id="...",
    required_scopes=["read"],
    base_url="http://localhost:8000",
    enable_cimd=False,  # now works
)

Closes #3602