Add OIDCProxy to auth module exports (#2308)

Fixes #2298

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Jeremiah Lowin <jlowin@users.noreply.github.com>

Author: jlowin

src/fastmcp/server/auth/__init__.py

@@ -7,6 +7,7 @@
 )
 from .providers.jwt import JWTVerifier, StaticTokenVerifier
 from .oauth_proxy import OAuthProxy
+from .oidc_proxy import OIDCProxy
 
 
 __all__ = [
@@ -15,6 +16,7 @@
     "JWTVerifier",
     "OAuthProvider",
     "OAuthProxy",
+    "OIDCProxy",
     "RemoteAuthProvider",
     "StaticTokenVerifier",
     "TokenVerifier",