Get Trade Flow Universe

Taker flow for EVERY Hyperliquid perp over one window, biggest first.

taker_buy_ratio is buy notional over total (0..1; null for a coin with no fills). large_fill_share is the share of the window's notional from fills at or above large_fill_usd. partial_minutes counts the window's minutes our socket did not fully watch — the same for every row, since coverage is per connection, not per coin. Coins with zero fills in the window are omitted. as_of is the window's end (the last closed minute). Pro Plus.