feat: add inventory metadata updates

backend/app/inventory/models.py

@@ -4,7 +4,7 @@ from datetime import datetime
 from typing import Literal
 from uuid import UUID
 
-from pydantic import BaseModel, Field, IPvAnyAddress
+from pydantic import BaseModel, ConfigDict, Field, IPvAnyAddress
 
 
 LifecycleStatus = Literal["active", "spare", "retired"]
@@ -60,6 +60,16 @@ class InventoryCreateRequest(BaseModel):
     tags: list[str] = Field(default_factory=list)
 
 
+class InventoryMetadataUpdateRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    asset_id: str | None = Field(default=None, max_length=120)
+    miner_sn: str | None = Field(default=None, max_length=255)
+    psu_serial: str | None = Field(default=None, max_length=255)
+    model: str | None = Field(default=None, max_length=255)
+    notes: str | None = None
+
+
 class InventoryUpdateRequest(BaseModel):
     asset_id: str | None = Field(default=None, max_length=120)
     current_mac: str | None = Field(default=None, max_length=64)