* improvements to sqlite source metadata query
* table metadatawriter colorization tuning; minor testh.Helper refactoring
* cleanup of metadata for multiple drivers
* more cleanup of source/table metadata
* yet more cleanup of source/table metadata
* improvements to mysql SourceMetadata
* improvements to mysql TableMetadata
* yet more fiddling with mysql metadata
* initial refactoring for the numRows param
* work on driver.NewBatchInsert
* work on NewBatchInsert
* batch insert seems to work
* switched testh.Insert to use BatchInsert
* doc cleanup
* batch insert for dbwriter and csv
* removed unneeded NumRows from driver.StmtExecer
* minor tidyup
* added Go dependency cache to go.yml workflow
* more windows path issues
* docs
* restricting workflow triggers to master
* wrong cleanup order for downloaded files
* de-restricting workflow triggers, for now
* more out-of-order cleanup issues that only manifested on windows
* more out-of-order cleanup issues
* removed mediatype check from TestFetchFile; FetchFile is deprecated and not worth fixing
* tracked down out-of-sequence close/remove issue with sqlite
* probably long-running test failure
* disabling long-running tests that are breaking CI
* switching to go test -short because tests seem to be taking too long in CI
