Revoke full token chain on OIDC authorization-code replay

The replay handler previously used a created_at time-range filter to
target access tokens and called update_all(expires_at:), which left
revoked_at nil, skipped refresh tokens entirely, and could miss or
falsely catch tokens from concurrent flows. Add an oidc_authorization_code
FK on both token tables, carry it through refresh-token rotation, and
use the association to revoke every descendant via revoke! (which sets
revoked_at and cascades access -> refresh).

Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>

app/models/oidc_refresh_token.rb

@@ -2,6 +2,7 @@ class OidcRefreshToken < ApplicationRecord
   belongs_to :application
   belongs_to :user
   belongs_to :oidc_access_token
+  belongs_to :oidc_authorization_code, optional: true
 
   before_validation :generate_token, on: :create
   before_validation :set_expiry, on: :create