Add admin user management

app/schemas/user.py

@@ -0,0 +1,59 @@
+"""User request and response schemas."""
+
+from __future__ import annotations
+
+from datetime import datetime
+
+from pydantic import BaseModel, Field, field_validator
+
+
+class UserResponse(BaseModel):
+    id: str
+    username: str
+    email: str | None = None
+    created_at: datetime | None = None
+    updated_at: datetime | None = None
+
+
+class CreateUserRequest(BaseModel):
+    username: str = Field(min_length=1)
+    email: str | None = None
+
+    @field_validator("username")
+    @classmethod
+    def normalize_username(cls, value: str) -> str:
+        normalized = value.strip()
+        if not normalized:
+            raise ValueError("username은 비어 있을 수 없습니다")
+        return normalized
+
+    @field_validator("email")
+    @classmethod
+    def normalize_email(cls, value: str | None) -> str | None:
+        if value is None:
+            return None
+        normalized = value.strip()
+        return normalized or None
+
+
+class UpdateUserRequest(BaseModel):
+    username: str | None = Field(default=None, min_length=1)
+    email: str | None = None
+
+    @field_validator("username")
+    @classmethod
+    def normalize_username(cls, value: str | None) -> str | None:
+        if value is None:
+            return None
+        normalized = value.strip()
+        if not normalized:
+            raise ValueError("username은 비어 있을 수 없습니다")
+        return normalized
+
+    @field_validator("email")
+    @classmethod
+    def normalize_email(cls, value: str | None) -> str | None:
+        if value is None:
+            return None
+        normalized = value.strip()
+        return normalized or None