Add SNMP device discovery API

backend/app/schemas/core.py

@@ -1,6 +1,5 @@
 from datetime import datetime
-from typing import Any
-from typing import Literal
+from typing import Any, Literal
 
 from pydantic import BaseModel, Field
 
@@ -211,3 +210,35 @@ class SnmpCredentialProfileRead(BaseModel):
     has_secret: bool
     created_at: datetime
     updated_at: datetime
+
+
+class SnmpDiscoveryRequest(BaseModel):
+    host: str = Field(min_length=1, max_length=255)
+    credential_profile_id: int
+
+
+class SnmpDiscoveredInterfaceRead(BaseModel):
+    index: int
+    name: str
+    description: str | None
+    admin_status: str | None
+    oper_status: str | None
+    speed_bps: int | None
+
+
+class SnmpDiscoveryItemRead(BaseModel):
+    item_id: str
+    item_type: str
+    group: str
+    label: str
+    unit: str | None = None
+
+
+class SnmpDiscoveryRead(BaseModel):
+    host: str
+    credential_profile_id: int
+    device_name: str | None
+    description: str | None
+    uptime_seconds: int | None
+    interfaces: list[SnmpDiscoveredInterfaceRead]
+    monitorable_items: list[SnmpDiscoveryItemRead]