Filter out MEV Swaps that cause noisy Wicks in Candles

[cadezacharias-hype]

Sandwich attacks are causing candle wicks in GCGO-Candle to appear out of scale:

Orignal GC python server has logic for filtering these out.

[PaulMcInnis]

NOTE: this is a lower prio than #2

[PaulMcInnis]

high-prio blocks deployment