Verdi RDA DUTRCA: needs same-seed pass/fail FSDB pair, -kdb simv.daidir; reports ranks, not confidence

From the Verdi W-2024.09 RDA_UserGuide (doc only, nothing run). Regression binning (autorca -gen_cfg_template b.yaml -gen_mode binning, then autorca -cfg b.yaml) reads only the failing logs listed in regression: latest_fail_list. It only knows UVM/OVM/SVA/constraint/VCS errors natively. Custom TB messages need a rule file (filter=/re/, field=/...@TIME@...@SCOPE@/, waive=, pass=, replace_src=/replace_dest=, priority= where lower is higher). Enabling multiple_error_binning disables the facilitator and RCA. DUTRCA (-gen_mode dutrca) needs target_waveform/target_simv_daidir/target_sim_log plus reference_waveform, where simv.daidir comes from the unified flow with -kdb. Per the guide it works best with the same seed and no TB change. target_scope is required with no default. With design_based_root_cause: true it diffs the two daidirs and stops tracing at the changed lines, which makes 'found the reverted line' easy, so score it separately from the signal-only mode. The output dutrca_report.xml gives <sig>#<time>(module:<m>) or <file>:<line>(module:<m>), ranked by waveform dissimilarity and signal-name match against the log. There is no numeric confidence, and the XML schema is undocumented.