Add tests for authentication and utilities, and update dependencies

- Created a new test package for services and added tests for AuthService.
- Implemented tests for user registration, login, and token creation.
- Added a new test package for utilities and included tests for password and JWT utilities.
- Updated `uv.lock` to include new dependencies: bcrypt, email-validator, pyjwt, and pytest-asyncio.

app/schemas/auth.py

@@ -0,0 +1,53 @@
+"""Authentication schemas."""
+
+from datetime import datetime
+from typing import Any
+
+from pydantic import BaseModel, EmailStr, Field
+
+
+class UserRegisterRequest(BaseModel):
+    """Schema for user registration request."""
+
+    email: EmailStr = Field(..., description="User email address")
+    password: str = Field(
+        ..., min_length=8, description="User password (minimum 8 characters)",
+    )
+    name: str = Field(..., min_length=1, max_length=100, description="User full name")
+
+
+class UserLoginRequest(BaseModel):
+    """Schema for user login request."""
+
+    email: EmailStr = Field(..., description="User email address")
+    password: str = Field(..., description="User password")
+
+
+class TokenResponse(BaseModel):
+    """Schema for authentication token response."""
+
+    access_token: str = Field(..., description="JWT access token")
+    token_type: str = Field(default="bearer", description="Token type")
+    expires_in: int = Field(..., description="Token expiration time in seconds")
+
+
+class UserResponse(BaseModel):
+    """Schema for user information response."""
+
+    id: int = Field(..., description="User ID")
+    email: str = Field(..., description="User email address")
+    name: str = Field(..., description="User full name")
+    picture: str | None = Field(None, description="User profile picture URL")
+    role: str = Field(..., description="User role")
+    credits: int = Field(..., description="User credits")
+    is_active: bool = Field(..., description="Whether user is active")
+    plan: dict[str, Any] = Field(..., description="User plan information")
+    created_at: datetime = Field(..., description="User creation timestamp")
+    updated_at: datetime = Field(..., description="User last update timestamp")
+
+
+class AuthResponse(BaseModel):
+    """Schema for authentication response."""
+
+    user: UserResponse = Field(..., description="User information")
+    token: TokenResponse = Field(..., description="Authentication token")