first commit

app/messages/schemas.py

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+from datetime import datetime
+
+from pydantic import BaseModel, ConfigDict, Field
+
+from app.messages.models import MessageType
+
+
+class MessageRead(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    id: int
+    chat_id: int
+    sender_id: int
+    type: MessageType
+    text: str | None
+    created_at: datetime
+    updated_at: datetime
+
+
+class MessageCreateRequest(BaseModel):
+    chat_id: int
+    type: MessageType = MessageType.TEXT
+    text: str | None = Field(default=None, max_length=4096)
+
+
+class MessageUpdateRequest(BaseModel):
+    text: str = Field(min_length=1, max_length=4096)