Bugfix: Return all inner transactions are returned for logs endpoint.

[algochoi]

Summary

This PR removes deduplication when returning inner transaction results. Without this check, a query that should return all matched inner txns will return only the first result as inner txns all share the same txID as their root txn. Currently, this only affects the applications/ID/logs endpoint, as inner txns are otherwise "rolled up" and any queries matches on inner txns return its root txn anyway.

Test Plan

Added test case to check that results are returned properly without deduplication based on txID when logs are queried. Tested locally on sandbox as well, and multiple logs with same txIDs show up.

Prior to this change, the added unit test will only return the first inner txn's logs and fail.

[codecov-commenter]

Codecov Report

Merging #915 (f38da76) into develop (4eaadeb) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop     #915   +/-   ##
========================================
  Coverage    58.03%   58.03%           
========================================
  Files           40       40           
  Lines         4637     4637           
========================================
  Hits          2691     2691           
  Misses        1615     1615           
  Partials       331      331           

Impacted Files	Coverage Δ
api/handlers.go	69.27% <100.00%> (ø)

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