consensus/parlia: add GetJustifiedNumber and GetFinalizedNumber

[buddh0]

Description

consensus/parlia: add GetJustifiedNumber and GetMinerHistory

Rationale

parlia_getJustifiedNumber

curl http://127.0.0.1:8545/ \
	-X POST \
	-H "Content-Type: application/json" \
	--data '{"method":"parlia_getJustifiedNumber","params":["0x116"],"id":1,"jsonrpc":"2.0"}'

{"jsonrpc":"2.0","id":1,"result":277}

parlia_getFinalizedNumber

curl http://127.0.0.1:8545/ \
	-X POST \
	-H "Content-Type: application/json" \
	--data '{"method":"parlia_getFinalizedNumber","params":["0x116"],"id":1,"jsonrpc":"2.0"}'

{"jsonrpc":"2.0","id":1,"result":276}

Example

add an example CLI or API response...

Changes

Notable changes:

• add each change in a bullet point here
• ...

[zzzckck]

add some background:
this is for some test case to make it easier to check the network stabillity around some block height.