Optimize SimpleTranslator remap caching and fix rowId/Name collision

[labkey-jeckels]

Rationale

Speeds up foreign key remapping during import by keeping resolved lookups cached across rows, and fix a latent inadvertent re-lookup issue.

Changes

• Resolved lookups stay cached for the life of the import instead of being discarded every time the per-row primary-key toggle flips.
• Foreign key values reach title-column resolution as their own type, so only a string can match a name and a value already typed as the primary key is written through as the key it is.
• A lookup matching no rows records and reports the miss instead of throwing on first use.
• Tests cache retention across per-row toggle collisions across lists, sample types, data classes and user display names

Tasks

• Claude Code Review
• Manual Testing
• Test Automation
• Fix broken tests