feat: run integration tests on PR

[cka-y]

Summary:

• Added a GitHub Action that connects the local API to the QA database to run integration tests.
• Introduced a DATASETS_LIMIT environment variable to limit the number of datasets tested. This is set to 25 for local integration tests.

Please make sure these boxes are checked before submitting your pull request - thanks!

• Run the unit tests with ./scripts/api-tests.sh to make sure you didn't break anything
• Add or update any needed documentation to the repo
• Format the title like "feat: [new feature short description]". Title must follow the Conventional Commit Specification(https://www.conventionalcommits.org/en/v1.0.0/).
• Linked all relevant issues
• Include screenshot(s) showing how this pull request works and fixes the issue(s)