Description of changes

SQL Server's tinyint is an unsigned 8-bit integer, meaning it stores values from 0 to 255. Ibis 8-bit integer is signed, meaning it stores range -128 to 127.

Change in this PR detects SQL Server tinyint as 16-bit int.

Issues to be closed

Closes #1585

Checklist

• I have followed the CONTRIBUTING Guide.
• I have commented my code, particularly in hard-to-understand areas
• I have updated any relevant documentation to reflect my changes, if applicable
• I have added unit and/or integration tests relevant to my change as needed
• I have already checked locally that all unit tests and linting are passing (use the tests/local_check.sh script)
• I have manually executed end-to-end testing (E2E) with the affected databases/engines