Feat: batch create endpoints for work orders and spare parts

[mukama]

POST /auth/work-orders/batch

curl -X POST http://localhost:3000/auth/work-orders/batch \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "type": 2,
    "devices": [
      { "deviceType": "miner", "deviceModel": "whatsminer-m63s", "deviceIdentifier": "WMM63S-2024-04829" },
      { "deviceType": "miner", "deviceModel": "whatsminer-m63s", "deviceIdentifier": "WMM63S-2024-04830" },
      { "deviceType": "miner", "deviceModel": "whatsminer-m63s", "deviceIdentifier": "WMM63S-2024-04831" }
    ],
    "info": { "location": "site.miner-room" }
  }'

POST /auth/spare-parts/batch

curl -X POST http://localhost:3000/auth/spare-parts/batch \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "rackId": "inventory-miner_part-psu-rack-1",
    "note": "Pallets 1-3",
    "parts": [
      { "deviceType": "psu", "deviceModel": "PSU-A", "serialNum": "SN-1" },
      { "deviceType": "psu", "deviceModel": "PSU-A", "serialNum": "SN-2" }
    ]
  }'