Latency: Need to unnest "statistics" column and cast to appropriate dtypes

[blaylockbk]

from synoptic import Latency

df = Latency(
    stid="wbb",
    start=datetime(2024, 6, 6),
    end=datetime(2024, 6, 6, 1),
    stats="all",
).df()

# SynopticPy should unnest "statistics" column for you...
df.unnest("statistics")

Need to cast columns to appropriate type (datetime, duration, etc.)

This service reports the delay time (in minutes) of an observation received at our ingest servers relative to the observation’s timestamp.
https://docs.synopticdata.com/services/latency

Duration columns

• value
• average
• maximum
• minimum
• standard_deviation
• median

Datetime columns

• date_time
• start
• end
• maxtime
• mintime

Count column should be an uint64, right?

Restricted_data and Restricted metadata should be bool