Fix missing pegRatio in .info (Fixes #2570)

[welcra]

Verified that pegRatio is missing from both standard modules and the timeseries API, which caused previous attempts to fail. Implemented a fallback that parses the Key Statistics HTML page using pd.read_html when the API returns None.

[ValueRaider]

Because key-statistics is a separate page, then the fetch and accessor should be separate from info. E.g.:

@property
def statistics(self):
  return self._statistics.get()

Also fix that git history - you need to rebase to dev.