Brummel
0288878ad2
The --macd flag was a back-compat alias for --harness macd, added in cycle 0065 iter-3 while the uniform `--harness <name>` selector was introduced. With that selector in place the alias is pure redundancy, so drop it: --harness <name> is now the sole way to pick a built-in harness. Removed from parse_run_args: the macd_flag accumulator, its match arm, and the (harness, macd_flag) conflict resolution -- harness selection collapses to `harness.unwrap_or(HarnessKind::Sma)`. Both usage strings drop `[--macd]`; the parse_run_args doc and the parse_real_args note no longer cite the flag. The MACD harness itself is untouched: run_macd, the macd() composite, and `--harness macd` all stay. Tests updated -- the alias test becomes a positive `--harness macd -> Macd` test plus an assertion that `--macd` is now rejected as an unknown token; the "repeated --macd" edge is dropped (the flag is gone, and repeated-flag strictness is still covered by --harness/--trace). INDEX.md: the two realization notes that documented `--macd` as a live run form updated (`aura run [--real ...]`; `run --harness macd`). The historical graph-viewer retirement note and the frozen fieldtest capture are left as the record of their time. Verified: clippy --all-targets -D warnings clean; full suite 513 passed / 0 failed (assertions rewritten in place, no test count change); live smoke -- `aura run --harness macd` emits a RunReport, `aura run --macd` exits with the updated usage.