Parses JSON market data into the canonical dataset shape (unvalidated).
Accepts either a full dataset object with a bars field, or a bare array
of OHLCV bars (wrapped with symbol/source from options). Bar timestamps in
compact-date or epoch-seconds form are normalized to ISO calendar dates.
Parses JSON market data into the canonical dataset shape (unvalidated). Accepts either a full dataset object with a
barsfield, or a bare array of OHLCV bars (wrapped with symbol/source from options). Bar timestamps in compact-date or epoch-seconds form are normalized to ISO calendar dates.