v1.15.8 - Fix Yahoo Finance CSV parsing

What's Changed

Bug Fixes

• Fixed index out of range error in Yahoo Finance CSV parsing test
• Enhanced error handling across multiple modules

Improvements

• Added CSVImporter implementation for integration tests
• Improved validation types and financial validation
• Updated MCP tools and prompts
• Various test improvements and fixes

Testing

All tests passing including the previously failing "Yahoo Finance CSV parsing" test.

Full Changelog: v1.15.7...v1.15.8