Handle combatant info not containing spec ids for "players in fight" api endpoint

[Krealle]

combatantInfo can be empty which causes the endpoint to throw when trying to access the spec ids.

{
  name: 'Melinoé',
  id: 33,
  guid: 101415068,
  type: 'Druid',
  server: "Shek'zeer",
  region: 'EU',
  icon: 'Druid-Feral',
  specs: [ { spec: 'Feral', count: 1 } ],
  minItemLevel: 524,
  maxItemLevel: 524,
  potionUse: 0,
  healthstoneUse: 0,
  combatantInfo: []
}

{"level":30,"time":1767987260652,"pid":135390,"hostname":"","reqId":"req-3","req":{"method":"GET","url":"/i/v2/report/zQtqGWjMkPh48b6V/fight/1/players","hostname":"localhost:3001","remoteAddress":"127.0.0.1","remotePort":52282},"msg":"incoming request"}
TypeError: Cannot read properties of undefined (reading '0')
    at extractPlayerDetails (.../wowa-server/src/route/wcl/fight-players.ts:63:35)

[emallson]

dammit, good catch