feat: use db store for consent

sql/sqlite/oidc_schemas.sql

@@ -9,3 +9,11 @@ CREATE TABLE IF NOT EXISTS "oidc_sessions" (
     "nonce" TEXT NOT NULL DEFAULT "",
     "userinfo_json" TEXT NOT NULL
 );
+
+CREATE TABLE IF NOT EXISTS "oidc_consents" (
+    "username" TEXT NOT NULL,
+    "client_id" TEXT NOT NULL,
+    "scope" TEXT NOT NULL,
+    "created_at" INTEGER NOT NULL,
+    PRIMARY KEY ("username", "client_id")
+);