fix: revoke access token on duplicate auth code user

sql/oidc_schemas.sql

@@ -13,6 +13,7 @@ CREATE TABLE IF NOT EXISTS "oidc_tokens" (
     "sub" TEXT NOT NULL UNIQUE,
     "access_token_hash" TEXT NOT NULL PRIMARY KEY UNIQUE,
     "refresh_token_hash" TEXT NOT NULL,
+    "code_hash" TEXT NOT NULL,
     "scope" TEXT NOT NULL,
     "client_id" TEXT NOT NULL,
     "token_expires_at" INTEGER NOT NULL,