fix comma separated insertion for questdb

[merowinger92]

Description of code - what bug does this fix / what feature does this add?

• ensure correct comma separated insertion of values to questDB

fixes #879

• [x] - Tested
• [x] - Changelog updated
• [x] - Tests run and pass
• [x] - Flake8 run and all errors/warnings resolved
• [ ] - Contributors file updated (optional)

[bmoscon]

@merowinger92 can you make this ready for review? Its marked as a draft

[bmoscon]

no response for close to a year, closing