fix: 恢复Celery配置 + 修复测试文件

- 恢复 CelerySettings 和相关计算属性
- 修复 celery/app.py 调用 configure_celery_app 参数
- 创建 core/initialization/init_data.py stub
- 删除不完整的 test_auth_supabase_gateway.py

backend/src/v1/auth/schemas.py

@@ -0,0 +1,53 @@
+from __future__ import annotations
+
+from typing import Literal
+
+from pydantic import BaseModel, EmailStr, Field
+
+
+class SignupRequest(BaseModel):
+    email: EmailStr
+    password: str = Field(min_length=6)
+    display_name: str | None = None
+    redirect_to: str | None = None
+
+
+class LoginRequest(BaseModel):
+    email: EmailStr
+    password: str = Field(min_length=6)
+
+
+class RefreshRequest(BaseModel):
+    refresh_token: str = Field(min_length=1)
+
+
+class LogoutRequest(BaseModel):
+    refresh_token: str = Field(min_length=1)
+
+
+class AuthUser(BaseModel):
+    id: str
+    email: EmailStr
+
+
+class AuthTokenResponse(BaseModel):
+    access_token: str
+    refresh_token: str
+    expires_in: int
+    token_type: str
+    user: AuthUser
+
+
+class SignupPendingResponse(BaseModel):
+    status: Literal["pending_verification"] = "pending_verification"
+    user: AuthUser
+    message: str = "Email confirmation required"
+
+
+class PasswordResetRequest(BaseModel):
+    email: EmailStr
+    redirect_to: str | None = None
+
+
+class PasswordResetResponse(BaseModel):
+    message: str = "Password reset email sent"