feat instrument pgx CopyFrom

[vinicius-batista]

Links

Closes #825

Details

The implementation and tests was simple but I have a problem running tests when snapshot was already created.
The current installed version from pgsnap fails when read CopyData from snapshot.
At pgsnap's latest version CopyData and other messages were implemented but pgproto is failing to unmarshal CopyInResponse message.

I don't know how to proceed with this implementation as some tests are failing due to external dependencies.

[CLAassistant]

All committers have signed the CLA.

[vinicius-batista]

@iamemilio

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.37%. Comparing base (d752b7e) to head (dc1ed85).
⚠️ Report is 395 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #826      +/-   ##
===========================================
+ Coverage    80.06%   80.37%   +0.30%     
===========================================
  Files          136      138       +2     
  Lines        12358    12489     +131     
===========================================
+ Hits          9895    10038     +143     
+ Misses        2180     2169      -11     
+ Partials       283      282       -1     

see 4 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d752b7e...dc1ed85. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[nr-swilloughby]

Thanks for your PR. We'll review it.