feat: add read-only inventory API

backend/app/inventory/models.py

@@ -84,3 +84,21 @@ class InventorySearchFilters(BaseModel):
     tags: list[str] = Field(default_factory=list)
     limit: int = Field(default=100, ge=1, le=500)
     offset: int = Field(default=0, ge=0)
+
+
+class InventoryListMeta(BaseModel):
+    limit: int
+    offset: int
+    returned: int
+
+
+class InventoryMinerListResponse(BaseModel):
+    data: list[InventoryMinerSummary]
+    meta: InventoryListMeta
+    error: None = None
+
+
+class InventoryMinerDetailResponse(BaseModel):
+    data: InventoryMinerDetail
+    meta: dict[str, object] = Field(default_factory=dict)
+    error: None = None