feat: add v3 balance changes endpoints

[rafa-stacks]

Both for inside a transaction and also across multiple transactions

[codecov]

Codecov Report

❌ Patch coverage is 93.42215% with 79 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/api/serializers/v3/transactions.ts	37.09%	39 Missing ⚠️
src/api/schemas/v3/params.ts	57.53%	31 Missing ⚠️
src/datastore/v3/pg-store-v3.ts	98.40%	4 Missing ⚠️
src/api/routes/v3/principals.ts	98.34%	2 Missing ⚠️
src/api/serializers/v3/balance-changes.ts	96.77%	2 Missing ⚠️
...ions/1778599015338_principal-tx-balance-changes.ts	99.68%	0 Missing and 1 partial ⚠️

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