Improvements and fixes

Improvements

• Improved FLEXHEADERS by adding quarterly option
• Improved dashboard views by auto-running queries and prompting reload
• Improved CSV datasources by storing them in data warehouse
• Improved error messages when a connector has disconnected
• Improved AI agent defaults by improving context and upgrading LLM models
• Improved AI agents to read bulk information in workbooks
• Line charts now fill in gaps where data is missing

Fixes

• Fixed an issue where Slack connection may incorrectly display an error
• Fixed a vague error when downloading a file as Excel
• Fixed vague error messages when CSV uploads fail
• Fixed an issue where filtering in a workbook may crash page
• Fixed an issue where writeback sources may showing up duplicatively