PersonalDiagnostics

Two optimization and validation passes. Diagnostics preserve the full 160-record capacity when grouping repeats, expire entries during export, repair malformed records and discard protected numeric values before comparison. Mythic+ reports include dungeon identity, outcome and the final sample. Large exports end at complete lines with an explicit marker. Ctrl+C instructions clarified. Private voluntary support is preserved. Local tests passed; live WoW validation remains necessary.