feat(db): add migrations for RBAC, diagnostic, messaging, attendance, leave, invitation codes

- 0011: RBAC role flags and seed data

- 0012: diagnostic grade_id

- 0013: message recall

- 0014: message templates

- 0015: group messages and message reports/blocks

- 0016: invitation codes

- 0017: draft device sync

- 0018: attendance status reason

- 0019: attendance warning thresholds

- 0020: leave requests

- 0021: attendance period

drizzle/0016_message_reports_and_blocks.sql

@@ -0,0 +1,35 @@
+-- P2-5: 消息举报 + 用户屏蔽
+-- 1. message_reports: 举报记录（reporterId → messageId / reportedUserId）
+-- 2. user_blocks: 用户屏蔽关系（blockerId → blockedId，唯一约束防重复）
+
+CREATE TABLE `message_reports` (
+  `id` varchar(128) NOT NULL,
+  `reporter_id` varchar(128) NOT NULL,
+  `message_id` varchar(128) NOT NULL,
+  `reported_user_id` varchar(128) NOT NULL,
+  `reason` varchar(50) NOT NULL,
+  `description` text,
+  `status` varchar(20) NOT NULL DEFAULT 'pending',
+  `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  `updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (`id`),
+  INDEX `message_reports_reporter_idx` (`reporter_id`),
+  INDEX `message_reports_message_idx` (`message_id`),
+  INDEX `message_reports_reported_user_idx` (`reported_user_id`),
+  INDEX `message_reports_status_idx` (`status`),
+  CONSTRAINT `message_reports_reporter_id_users_id_fk` FOREIGN KEY (`reporter_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
+  CONSTRAINT `message_reports_message_id_messages_id_fk` FOREIGN KEY (`message_id`) REFERENCES `messages`(`id`) ON DELETE CASCADE,
+  CONSTRAINT `message_reports_reported_user_id_users_id_fk` FOREIGN KEY (`reported_user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE
+);
+
+CREATE TABLE `user_blocks` (
+  `id` varchar(128) NOT NULL,
+  `blocker_id` varchar(128) NOT NULL,
+  `blocked_id` varchar(128) NOT NULL,
+  `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  PRIMARY KEY (`id`),
+  UNIQUE INDEX `user_blocks_blocker_blocked_uniq` (`blocker_id`, `blocked_id`),
+  INDEX `user_blocks_blocker_idx` (`blocker_id`),
+  CONSTRAINT `user_blocks_blocker_id_users_id_fk` FOREIGN KEY (`blocker_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
+  CONSTRAINT `user_blocks_blocked_id_users_id_fk` FOREIGN KEY (`blocked_id`) REFERENCES `users`(`id`) ON DELETE CASCADE
+);