fix map parsing from death events

where did `Autoplay` come from? we shouldn't be using that for the map name, we have it in the json

EVENT: Autoplay.JCDentonMale0: {"type":"DEATH","victim":"JC Denton","victimBindName":"JCDenton","killerclass":"GuntherHermann","killer":"Gunther Hermann","dmgtype":"Flamed","PlayerName":"JC Denton","map":"04_NYC_BATTERYPARK","mapname":"NYC - Battery Park","mission":"4","TrueNorth":"16384","PlayerIsFemale":"False","GameMode":"Original Story","newgameplus_loops":"0","loadout":"All Items Allowed","location":"-3593.155762,1315.968506,363.899994"}

the deaths table doesn't actually have a map column though, it's joined to logs

Start from the death-event parsing entry point and inspect how the JSON `map` and `mapname` fields are handled. Follow how deaths are joined to logs and verify that the deaths view reports the map name from the event JSON rather than `Autoplay`; done means the provided event produces the expected `NYC - Battery Park` map name.

Written by the indexing model from the issue text.