Add comprehensive XML documentation (param/returns tags) across 132 source
files to improve IntelliSense and API discoverability. Include ConfigManager
design documents and implementation plans for phases 1-9.
Remove 9 unused types from Core (duplicate extension classes, TableSpec, ColumnSpec, LotLocation), move ComponentLotViewModel and OperatorViewModel from Client to Core, and refactor DataSync.Dev to use pipeline-based configuration. Fix Login.razor to use UserInfoDto directly.