fix shared database account sequence initialization

docs/sql/IM-后台消息与登录审计SQL.sql

@@ -59,6 +59,22 @@ CREATE TABLE IF NOT EXISTS im_login_failure_logs (
     INDEX idx_im_login_failure_request (request_id)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
 
+CREATE TABLE IF NOT EXISTS im_login_lockouts (
+    id BIGINT NOT NULL,
+    user_id BIGINT NULL,
+    account_hash CHAR(64) NOT NULL,
+    failed_attempts INT NOT NULL DEFAULT 0,
+    window_started_at DATETIME(3) NULL,
+    locked_until DATETIME(3) NULL,
+    last_attempt_at DATETIME(3) NULL,
+    created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+    updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
+    PRIMARY KEY (id),
+    UNIQUE INDEX uk_im_login_lockouts_account (account_hash),
+    INDEX idx_im_login_lockouts_user (user_id),
+    INDEX idx_im_login_lockouts_locked (locked_until)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+
 CREATE TABLE IF NOT EXISTS im_message_admin_actions (
     id BIGINT NOT NULL AUTO_INCREMENT,
     action_id VARCHAR(96) NOT NULL,