M8-T11: add WarmteLink discovery and history API

app/schemas/meter_source.py

@@ -64,7 +64,23 @@ class DiscoverResponse(BaseModel):
     requested: bool
     supported: bool
     status: str
+    request_id: int | None = None
     detail: str | None = None
+    channels: list["DiscoverChannelResponse"] = Field(default_factory=list)
+
+
+class DiscoverChannelResponse(BaseModel):
+    uuid: str
+    label: str
+    unit: str
+    latest_value: Decimal | None
+    latest_at: datetime | None
+    latest_quality: str | None
+
+
+class ChannelBindingSummaryResponse(BaseModel):
+    count: int
+    meter_ids: list[int]
 
 
 class CommodityResponse(BaseModel):
@@ -88,11 +104,13 @@ class MeterSourceChannelResponse(BaseModel):
     latest_quality: str | None
     binding_count: int
     bound_meter_ids: list[int]
+    binding_summary: ChannelBindingSummaryResponse
 
 
 class MeterSourceChannelListResponse(BaseModel):
     items: list[MeterSourceChannelResponse]
     total: int
+    source_status: str
 
 
 class ChannelReadingResponse(BaseModel):