Return Inner and Root transactions for nested logs support in C2C calls

[algochoi]

Summary

This PR includes some changes to support proper nested logs in inner transactions and adds/changes some tests to reflect this.

feature/contract-to-contract will now allow inner transactions to have appl calls. This means inner txns may also be recursive and many "levels" deep, as inner appl calls may have inner txns themselves.

Since logs are associated with each EvalDelta, logs returned by inner transactions would have to be recursively parsed or else the current API will return only the root txn's logs, even if the query matches an inner txn. This PR changes the transaction query to fetch for an inner txn if a returnInnerTxn flag in the filter is set to true so nested logs can be returned properly.

Test Plan

• Changed some existing tests that check for inner txns to include nested appl calls.
• Added an additional check to return the nested logs properly and check that non UTF-8s can be parsed correctly in inner asset/appl txns.
• Added a test to check if inner logs are being returned properly.

Note: This PR also depends on the go-algorand feature/contract-to-contract branch due to nested inner txn logic.

[winder]

We should implement this with a new option to the transactions query to select whether or not to return the root transaction when matching an inner transaction. If you wrapped the LEFT OUTER JOIN in buildTransactionQuery with the new flag, I think most of the logic you have should work without changes.

Let me know if I'm missing something.

[codecov-commenter]

Codecov Report

Merging #820 (a9fd9e8) into develop (60f4b43) will increase coverage by 0.23%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #820      +/-   ##
===========================================
+ Coverage    58.87%   59.10%   +0.23%     
===========================================
  Files           36       36              
  Lines         4372     4382      +10     
===========================================
+ Hits          2574     2590      +16     
+ Misses        1484     1482       -2     
+ Partials       314      310       -4     

Impacted Files	Coverage Δ
api/converter_utils.go	91.83% <100.00%> (+0.94%)	⬆️
api/handlers.go	71.10% <100.00%> (+0.12%)	⬆️
idb/idb.go	58.53% <100.00%> (+7.31%)	⬆️
idb/postgres/internal/writer/write_txn.go	79.38% <100.00%> (ø)
idb/postgres/postgres.go	49.18% <100.00%> (+0.13%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 60f4b43...a9fd9e8. Read the comment docs.

[winder]

Thanks for the updates, your changes look good. The only thing I see missing is a test that uses the new flag directly. Call db.Transactions with and without ReturnInnerTxnOnly and verify that the RootTxn is not returned when ReturnInnerTxnOnly is set.