- Remove actual availabilty start from the ondemand id key.
 - don't expand ondemands unless they have the correct youview platform
Ensure Pips OtherID is left in, as removal causes validation to fail for all ondemands.
Refactor Feed Statistics:
 - remove uptime, as metric is not useful
 - refactor writing, as feed stats will always be updated together
 - ensure both delta and bootstrap tasks set feed statistics correctly
Add version pid as OtherIdentifier to TVA versions