[FIX] Allow only "true" or None for is_control query parameter

[alyssadai]

• Closes Queries for is_control=False no longer work with restriction against unbound variables #332

Changes proposed in this pull request:

• is_control query param now accepts str, with allowed values being either "true" (case-insensitive) or None via custom validation
  • str used b/c using Literal to enforce allowed values of True or None doesn't play well in a query parameter (see comment in code)
  • "true" values transformed to boolean internally
• SPARQL query now only adds filter if is_control=True in query

Note: the default SPARQL query file hasn't changed in this case b/c it assumes no filters are applied

Checklist

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• PR has an interpretable title with a prefix ([ENH], [FIX], [REF], [TST], [CI], [MNT], [INF], [MODEL], [DOC]) (see our Contributing Guidelines for more info)
• PR has a label for the release changelog or skip-release (to be applied by maintainers only)
• PR links to GitHub issue with mention Closes #XXXX
• Tests pass
• Checks pass
• If the PR changes the SPARQL query template, the default Neurobagel query file has also been regenerated

For new features:

• Tests have been added

For bug fixes:

• There is at least one test that would fail under the original bug conditions.

[coveralls]

Pull Request Test Coverage Report for Build 11505364023

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.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 18 of 19 (94.74%) changed or added relevant lines in 3 files are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.03%) to 95.572%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
app/api/utility.py	1	2	50.0%

Files with Coverage Reduction	New Missed Lines	%
tests/test_query.py	3	98.34%

Totals
Change from base Build 11483707011:	-0.03%
Covered Lines:	777
Relevant Lines:	813

---

💛 - Coveralls

[rmanaem]

🧑‍🍳

[neurobagel-bot]

🚀 PR was released in v0.4.0 🚀