## Summary
Fixes a concurrent map access vulnerability in the OIDC handler that
could cause remote unauthenticated DoS.
## Changes
- Removed OIDC authorization flow endpoints ( and )
- Removed the unsynchronized map that caused the data race
- Kept only the OIDC token exchange endpoint ()
- Simplified by removing OAuth2 flow dependencies
The map was being accessed concurrently by the start (write) and
callback (read/delete) endpoints without synchronization, causing
runtime panics. Since the token exchange flow doesn't require session
state, removing the authorization flow eliminates the vulnerability
entirely.
5746e7e99b