feat(scada): add project monitoring replay

app/domain/schemas/scada.py

@@ -1,8 +1,8 @@
 from datetime import datetime
+from typing import Literal
 
 from pydantic import BaseModel, ConfigDict, Field
 
-
 class ScadaDeviceResponse(BaseModel):
     """Project SCADA metadata keyed by the canonical device identifier."""
 
@@ -47,3 +47,20 @@ class ScadaLatestReadingsResponse(BaseModel):
     offset: int = Field(ge=0)
     observed_count: int = Field(ge=0)
     latest_observed_at: datetime | None = None
+
+
+class ScadaRawReading(BaseModel):
+    model_config = ConfigDict(extra="forbid", allow_inf_nan=False)
+
+    time: datetime
+    device_id: str
+    monitored_value: float | None
+    quality: Literal["unvalidated", "missing", "invalid"] = "unvalidated"
+
+
+class ScadaRawPage(BaseModel):
+    model_config = ConfigDict(extra="forbid", allow_inf_nan=False)
+
+    items: list[ScadaRawReading]
+    next_cursor: str | None
+    scanned_through: datetime