Document real-world peak detector validation

docs/roadmap.md

@@ -31,7 +31,10 @@ tests against sanitized fixtures.
 The generic configurable sawtooth detector is implemented: it retains the
 current maximum, closes a cycle after a configurable below-peak fraction has
 actual sample support for a configurable elapsed duration, and emits one
-completed peak. Its pure state can later be persisted for incremental use.
+completed peak. Its pure state can later be persisted for incremental use. It
+has been validated with a clean K7 roll-length reference signal and a more
+variable Bento 2 roll-weight robustness signal; the latter includes plateaus,
+non-zero resets, and varying peak heights without detector special cases.
 
 ## Later