endpoint GET /peer/blocks is a lot slower than v1

[fix]

Describe the bug
when nodes rebuilds rfom network they ping /peer/blocks to get blocks in a range.
on v2 this is slow because contrary to v1 it needs to join programatically 'blocks' and 'transactions' table

Possible solutions:

• find faster way to join
• stream from snapshoted data (since blocks are stored with transactions in the same table)

[faustbrian]

#2307