fix: sqflite tests

[buenaflor]

📜 Description

💡 Motivation and Context

💚 How did you test it?

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• No new PII added or SDK only sends newly added PII if sendDefaultPii is enabled
• I updated the docs if needed
• All tests passing
• No breaking changes

🔮 Next steps

[github-actions]

	Fails
🚫	Please consider adding a changelog entry for the next release.

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

- sqflite tests ([#1806](https://github.com/getsentry/sentry-dart/pull/1806))

If none of the above apply, you can opt out of this check by adding #skip-changelog to the PR description.

Generated by 🚫 dangerJS against 49cd933

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (1cdcacf) 91.13% compared to head (49cd933) 88.07%.

Files	Patch %	Lines
sqflite/lib/src/sentry_database.dart	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1806      +/-   ##
==========================================
- Coverage   91.13%   88.07%   -3.07%     
==========================================
  Files         171        7     -164     
  Lines        5395      436    -4959     
==========================================
- Hits         4917      384    -4533     
+ Misses        478       52     -426     

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[denrase]

Also fixed this in #1807. We need to call the internal _database.readTransaction for this to be correct, no?

[buenaflor]

Fixed in #1807