chore: add some utils tests

[egor-romanov]

What kind of change does this PR introduce?

• just add some utils tests

Something is not right with coverage reporting

[sweatybridge]

This is mostly covered by internal/utils/api_test.go but was reported as 0% due to a bug in coverage reporting introduced by go 1.24 upgrade. I've fixed the coverage reporting issue so could you rebase and verify if these tests are improving coverage?

Historically a large part of this file was moved from internal/utils/api.go and it wasn't worth the effort to rewrite or refractor the tests that already covered the code paths.

[sweatybridge]

This test randomly fails due to a race condition in the underlying implementation. The code path is only affecting pgadmin schema diff tool which we plan to deprecate.

I'd suggest removing this test since there's no need to further maintain this code.

[coveralls]

Pull Request Test Coverage Report for Build 14834415000

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 5 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+1.2%) to 59.789%

---

Files with Coverage Reduction	New Missed Lines	%
internal/gen/keys/keys.go	5	12.9%

Totals
Change from base Build 14830218243:	1.2%
Covered Lines:	8994
Relevant Lines:	15043

---

💛 - Coveralls