Sectional Copy

Copies tblsectionalinrunning from the source database into sectional_race and sectional_run in the destination. Uses the Excel field mapping file to drive column mappings. Foreign keys (race, run, country) are resolved from existing config_id_mappings — missing parent rows are auto-copied from source rather than left NULL.

Must contain sheets: tblsectionalinrunning → sectional_race, tblsectionalinrunning → sectional_run.
Truncates sectional_race, sectional_run and removes config_id_mappings. Use before a full re-run.