=== PostgreSQL 전용 스키마 ===
CREATE TABLE oauth2_authorized_client (
  client_registration_id varchar(100) NOT NULL,
  principal_name varchar(200) NOT NULL,
  access_token_type varchar(100) NOT NULL,
  access_token_value bytea NOT NULL,
  access_token_issued_at timestamp NOT NULL,
  access_token_expires_at timestamp NOT NULL,
  access_token_scopes varchar(1000) DEFAULT NULL,
  refresh_token_value bytea DEFAULT NULL,
  refresh_token_issued_at timestamp DEFAULT NULL,
  created_at timestamp DEFAULT CURRENT_TIMESTAMP NOT NULL,
  PRIMARY KEY (client_registration_id, principal_name)
);

=== 적용 ===
CREATE TABLE
                                Table "public.oauth2_authorized_client"
         Column          |            Type             | Collation | Nullable |         Default         
-------------------------+-----------------------------+-----------+----------+-------------------------
 client_registration_id  | character varying(100)      |           | not null | 
 principal_name          | character varying(200)      |           | not null | 
 access_token_type       | character varying(100)      |           | not null | 
 access_token_value      | bytea                       |           | not null | 
 access_token_issued_at  | timestamp without time zone |           | not null | 
 access_token_expires_at | timestamp without time zone |           | not null | 
 access_token_scopes     | character varying(1000)     |           |          | NULL::character varying
 refresh_token_value     | bytea                       |           |          | 
 refresh_token_issued_at | timestamp without time zone |           |          | 
 created_at              | timestamp without time zone |           | not null | CURRENT_TIMESTAMP
Indexes:
    "oauth2_authorized_client_pkey" PRIMARY KEY, btree (client_registration_id, principal_name)