oopsy: ignore buffs on pets (#3708)
oopsy: ignore buffs on pets (#3708)

Summoner pets get damage buffs, but have a `0000` sourceId
and a blank `source` field.  Ignore gaining and losing these
effects.

26|2021-11-30T12:08:55.3420000-08:00|511|Embolden|0.00|0000||4001AA2E|Demi-Phoenix|04|119916||36d56cff42be79000154f3eb35b85c64
quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot