SubscriptionManager class, bugfixes

[droserasprout]

Improvements:

• Class that holds state of TzKT SignalR subscriptions
• Formatted logging of index messages

Bugfixes:

• Fix displaying help messages on known errors
• Fix missing ctx.logger in job handlers
• Fix incorrect job scheduler configuration

[droserasprout]

Tezos profiles indexer

[droserasprout]

Help messages not printed

[droserasprout]

Logs: index name

[m-kus]

More generic approach:

subscribe: default | all | by_entrypoints | by_code (future) | other

or

event_filters:
  - contracts (default)
  - types (default)
  - entrypoints

that way we can combine default filters (types + address) with entrypoints