[Mining] Get event about mined Tari / Monero in Tari and Merged mining

[tomaszantas]

• [ ] ensure that containers setup is correct and containers do real mining
• [ ] receive and process the event

It is blocked by two:

• need to use valid wallet

• 238

[tarnas14]

I think 'preserve the history of sessions' should be done in #46 we don't need the history to mine, the history is remembered only for the purpose of showing the statistics

[tarnas14]

waiting for "is_coinbase" to be populated correctly for transactions #358

[tarnas14]

as above (#358 will deal with the aftermath of this task)