[PART-3] Add transaction tax report

[ZIMkaRU]

This PR adds ability to fetch transactions entries based on trades, movements and ledgers tables for Transaction Tax Report

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It's a 1-part of the feature, the main idea taken from these PRs: #373, #378, #379

• separates into small parts
• improves and speeds up the currency conversion approach

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Basic changes:

• Adds ability to return exactUsdValue and _id for movements
• Adds ability to fetch transactions

[ezewer]

Comment

[ezewer]

I don't get this logic.
Is not the exact usd what we are trying to get.
Why would we need the first and last symbol price mapped to usd?
We should add the USD reference, lastSymbPriceUsd etc

[ZIMkaRU]

to simplify tax calc I would like to have a distinct data structure: just have firstSymbPrice and lastSymbPrice for pairs eg tETHBTC
At the same time, we can have movements eg BTC deposits, and should consider it like tBTCUSD
exactUsdValue - is the amount in transaction in USD (the logic would be as we planned) that can be used for calc prices of pairs eg tETHBTC
In other words, in tables, have one additional field exactUsdValue
when have exactUsdValue -> calc firstSymbPrice, lastSymbPrice
if don't have exactUsdValue -> get from pub-trades, set exactUsdValue to appropriate tables -> calc firstSymbPrice, lastSymbPrice
having firstSymbPrice, lastSymbPrice can calc tax report
the idea is to not calculate everything in one place

[ezewer]

lgtm!