Rescue Paperjet v1 implementation

backend/app/schemas/versions.py

@@ -0,0 +1,35 @@
+"""Version checkpoint schemas."""
+
+from datetime import datetime
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+from app.schemas.annotations import AnnotationPayload
+
+
+class VersionCreateRequest(BaseModel):
+    label: str | None = Field(default=None, max_length=120)
+    kind: Literal["manual", "auto"] = "manual"
+
+
+class VersionMeta(BaseModel):
+    id: str
+    documentId: str
+    label: str | None
+    kind: Literal["manual", "auto"]
+    createdAt: datetime
+    annotationCount: int
+
+
+class VersionListResponse(BaseModel):
+    items: list[VersionMeta]
+
+
+class VersionDataResponse(BaseModel):
+    data: list[AnnotationPayload]
+    meta: VersionMeta
+
+
+class VersionRestoreResponse(BaseModel):
+    updatedAt: datetime