add txn_participation.round filter

[urtho]

Summary

A fix for inefficient round filtering when using address filter.
fixes #1577

This request translates to query:

SELECT 
	t.round, t.intra, t.txn, root.txn, t.extra, t.asset FROM txn t
  JOIN txn_participation p ON t.round = p.round AND t.intra = p.intra
  LEFT OUTER JOIN txn root ON t.round = root.round AND (t.extra->>'root-intra')::int = root.intra 
  WHERE p.addr = '\x881a335631c1aaa46ed219bce34f30fb0e35a1bd8e1490802be795d8c2a7a16b' AND t.round <= 24553246
  ORDER BY p.addr, p.round DESC, p.intra DESC LIMIT 86

This query times out on any reasonable Postgres setup.

Adding a filter on p.round makes for proper use of the txn_participation index:

SELECT 
	t.round, t.intra, t.txn, root.txn, t.extra, t.asset FROM txn t
  JOIN txn_participation p ON t.round = p.round AND t.intra = p.intra
  LEFT OUTER JOIN txn root ON t.round = root.round AND (t.extra->>'root-intra')::int = root.intra 
  WHERE p.addr = '\x881a335631c1aaa46ed219bce34f30fb0e35a1bd8e1490802be795d8c2a7a16b' AND p.round <= 24553246 AND t.round <= 24553246
  ORDER BY p.addr, p.round DESC, p.intra DESC LIMIT 86  

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #1578 (d5c7315) into main (0f41c6d) will decrease coverage by 0.10%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1578      +/-   ##
==========================================
- Coverage   68.58%   68.49%   -0.10%     
==========================================
  Files          37       37              
  Lines        7417     7427      +10     
==========================================
  Hits         5087     5087              
- Misses       1903     1911       +8     
- Partials      427      429       +2     

Files	Coverage Δ
idb/postgres/postgres.go	66.98% <0.00%> (-0.31%)	⬇️

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