feat: bump version and add changelog.en

Signed-off-by: d0zingcat <iamtangli42@gmail.com>

docs/copilot-context.md

@@ -1,4 +1,4 @@
-# Project Context for GitHub Copilot (v1.3.2)
+# Project Context for GitHub Copilot (v1.3.3)
 
 This document provides technical context, architectural decisions, and code conventions for the **Alert Message Center** project. It is intended to help AI assistants understand the codebase.
 
@@ -241,6 +241,10 @@ The database schema is defined in `apps/server/src/db/schema.ts`.
   - **Token Migration**: The `db:migrate:deploy` script (defined in `src/db/migrate.ts`) also handles legacy user token shortening to maintain consistency with the 8-character token logic introduced in v1.2.6.
   - **Drizzle Meta**: The `apps/server/drizzle/meta` directory MUST NOT be ignored by git (it was previously explicitly excluded in `.gitignore` but has been restored). This directory contains `_journal.json`, which is essential for `drizzle-kit` and the runtime migrator to verify migration integrity. Without it, migrations will fail in clean environments like Docker containers.
 
+  - **Multi-Replica Support**:
+    - **Migrations**: The `db:migrate:deploy` script uses **Postgres Advisory Locks** to prevent race conditions when multiple replicas start simultaneously. Only one replica will execute the migration; others will wait and verify.
+    - **Feishu Events**: The event handling logic is designed to be idempotent (`onConflictDoUpdate`), making it safe to run multiple replicas receiving duplicated events from Feishu (via WebSocket or Webhook).
+
 ## 8. Core Documents
 
 - **[README.md](file:///Users/lilithgames/Workspace/play/alert-message-center/README.md)**: Main project documentation (English version).