fix: adding nested input variables in graphql plugin

[bodymindarts]

Which problem is this PR solving?

GraphQL inputs are frequently nested like:

{
  "input": {
    "value1": 1,
    "value2": 2
  }
}

Currently this would result the following call:

span.setAttribute("graphql.variables.input", Object({ value1: 1, value2: 2}))

But since SpanAttribute doesn't accept an Object type it silently fails
and doesn't add the attribute at all.

Short description of the changes

This PR goes depth-first into the nested structure and adds each
variable with the appropriate path like:

span.setAttribute("graphql.variables.input.value1", 1)
span.setAttribute("graphql.variables.input.value2", 2)

[obecny]

one concern to improve, other than that lgtm

[bodymindarts]

Force pushed with suggested modification

EDIT:
and rebased against main

[dyladan]

Please use conventional commits in your PR title as they are used to autogenerate new versions when packages are released. Your current title is not in the correct format and would be ignored, causing the package to not be released. If it is a bugfix that should only modify the PATCH version, please use feat: message_here. Otherwise, please use feat: message_here.

[codecov]

Codecov Report

Merging #720 (bca78e8) into main (62a04c7) will not change coverage.
The diff coverage is n/a.

❗ Current head bca78e8 differs from pull request most recent head 8290025. Consider uploading reports for the commit 8290025 to get more accurate results

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  Files          11       11           
  Lines         640      640           
  Branches      126      126           
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  Hits          620      620           
  Misses         20       20           

[bodymindarts]

Force pushed to amend commit message and fix linting.

[dyladan]

Thanks. Fixing the commit message doesn't matter as much as the PR title since the commits get squashed anyway and the PR title is used as the commit message.

[bodymindarts]

Another attempt to fix linting