chore: 更新项目配置和核心服务

- 更新package.json和jest配置
- 更新main.ts启动配置
- 完善用户管理和数据库服务
- 更新安全核心模块
- 优化Zulip核心服务

配置改进:
- 统一项目依赖管理
- 优化测试配置
- 完善服务模块化架构

src/core/db/users/users.entity.ts

@@ -33,6 +33,7 @@
 import { Entity, Column, PrimaryGeneratedColumn, CreateDateColumn, UpdateDateColumn, OneToOne } from 'typeorm';
 import { UserStatus } from './user_status.enum';
 import { ZulipAccounts } from '../zulip_accounts/zulip_accounts.entity';
+import { FIELD_LIMITS } from './users.constants';
 
 /**
  * 用户实体类
@@ -113,7 +114,7 @@ export class Users {
    */
   @Column({
     type: 'varchar',
-    length: 50,
+    length: FIELD_LIMITS.USERNAME_MAX_LENGTH,
     nullable: false,
     unique: true,
     comment: '唯一用户名/登录名'
@@ -141,7 +142,7 @@ export class Users {
    */
   @Column({
     type: 'varchar',
-    length: 100,
+    length: FIELD_LIMITS.EMAIL_MAX_LENGTH,
     nullable: true,
     unique: true,
     comment: '邮箱（用于找回/通知）'
@@ -196,7 +197,7 @@ export class Users {
    */
   @Column({
     type: 'varchar',
-    length: 30,
+    length: FIELD_LIMITS.PHONE_MAX_LENGTH,
     nullable: true,
     unique: true,
     comment: '全球电话号码（用于找回/通知）'
@@ -226,7 +227,7 @@ export class Users {
    */
   @Column({
     type: 'varchar',
-    length: 255,
+    length: FIELD_LIMITS.PASSWORD_HASH_MAX_LENGTH,
     nullable: true,
     comment: '密码哈希（OAuth登录为空）'
   })
@@ -254,7 +255,7 @@ export class Users {
    */
   @Column({
     type: 'varchar',
-    length: 50,
+    length: FIELD_LIMITS.NICKNAME_MAX_LENGTH,
     nullable: false,
     comment: '显示昵称（头顶显示）'
   })
@@ -282,7 +283,7 @@ export class Users {
    */
   @Column({
     type: 'varchar',
-    length: 100,
+    length: FIELD_LIMITS.GITHUB_ID_MAX_LENGTH,
     nullable: true,
     unique: true,
     comment: 'GitHub OpenID（第三方登录用）'
@@ -311,7 +312,7 @@ export class Users {
    */
   @Column({
     type: 'varchar',
-    length: 255,
+    length: FIELD_LIMITS.AVATAR_URL_MAX_LENGTH,
     nullable: true,
     comment: 'GitHub头像或自定义头像URL'
   })
@@ -381,7 +382,7 @@ export class Users {
    */
   @Column({
     type: 'varchar',
-    length: 20,
+    length: FIELD_LIMITS.STATUS_MAX_LENGTH,
     nullable: true,
     default: UserStatus.ACTIVE,
     comment: '用户状态：active-正常，inactive-未激活，locked-锁定，banned-禁用，deleted-删除，pending-待审核'