Chore(subscription-termination): change termination behaviour to hourly

[annvelents]

Context

Before we were comparing date of ending_at to date of today, resulting in subscirptions terminating sometimes long before their actual termination date

Now we'll be terminating each hour subscriptions that ended during this hour

Description

Changed TerminateEndedSubscriptionsJob to check which subscriptions need to be terminated by checking which of them are in the past

Edge cases:

1. Billing is at 00:10
   termination is at 23:59
   after billing, before subscription there is usage
   make sure no usage is lost

2. billing is at 00:10
   termination is at 00:10
   make sure there are no double-billing

3. Termination is at 00:01
   Billing is at 00:10
   no double invoices