fix(audio-quality): the congestion shaper profile ships as a moq-shaper builtin

rs/moq-shaper/README.md

@@ -148,7 +148,7 @@ delay = "5ms"
 ```
 
 `--profile` takes a file's path, or one of the built-ins in `profiles/`, embedded in the binary. The
-audio-quality lane (`test/audio-quality/`) uses `bursty` and `step`, plus its own flag profiles.
+audio-quality lane (`test/audio-quality/`) uses `bursty`, `step`, and `congestion`, plus its own flag profiles.
 
 | Name | What it models |
 | --- | --- |
@@ -159,6 +159,7 @@ audio-quality lane (`test/audio-quality/`) uses `bursty` and `step`, plus its ow
 | `cellular-step` | A 2 Mbit/s uplink behind a 500ms queue that drops to 500 kbit/s at 10s and recovers at 20s. |
 | `cellular-bursty` | A 2 Mbit/s uplink released in scheduler grants of five datagrams or 20ms, at 1 Mbit/s from 10s to 20s. |
 | `cellular-deep` | A 1 Mbit/s uplink behind a 2s queue that drops to 300 kbit/s at 10s and recovers at 20s. |
+| `congestion` | A 1 Mbit/s downlink behind a 1s queue that collapses to 16 kbit/s at 25s and recovers at 26.5s. |
 
 Each built-in is a shared path, as a browser page's sessions on one host would be. The `cellular-*` ones
 shape only the uplink and keep a plain delay on the way back, so the acknowledgments are not impaired.

rs/moq-shaper/src/preset.rs

@@ -14,6 +14,7 @@ const BUILTIN: &[(&str, &str)] = &[
 	("cellular-step", include_str!("../profiles/cellular-step.toml")),
 	("cellular-bursty", include_str!("../profiles/cellular-bursty.toml")),
 	("cellular-deep", include_str!("../profiles/cellular-deep.toml")),
+	("congestion", include_str!("../profiles/congestion.toml")),
 ];
 
 /// A named, seeded treatment of both directions, loaded from a TOML profile.

test/audio-quality/README.md

@@ -50,7 +50,7 @@ response would make a failure hard to attribute. The `mild` and `wide` profiles
 shaper startup, before the page connects; the driver gives up on a row with no audio 20 s in, so the
 measured window starts before the step, and `--duration` must exceed 30 s so playback spans it.
 
-`congestion` ([`congestion.toml`](congestion.toml)) is a queue that fills until it drops, as a
+`congestion` ([`congestion.toml`](../../rs/moq-shaper/profiles/congestion.toml)) is a queue that fills until it drops, as a
 congested link's does, rather than random loss. The tone needs about 140 kbit/s, so for a second and
 a half the queue holds its full second of wait and drops the rest, longer than any row's target.
 When the rate returns, the transport delivers the backlog, the queue's and every retransmit. The
@@ -388,7 +388,6 @@ run.sh                 builds, starts the relay and publishers, runs each row be
 ../lib/pulse.py        the native rows' private PulseAudio null sink
 record.sh              records traces/, by hand
 relay.toml             anonymous relay, self-signed cert
-congestion.toml        the congestion profile's shaper treatment
 budgets.json           a ceiling per metric per row
 traces/                recorded arrivals, one replay profile each
 clients/js/

test/audio-quality/run.sh

@@ -178,8 +178,7 @@ shaper_of() {
         near-zero | fixed-250) ;;
         mild) echo "--delay 5ms --jitter 5ms --jitter-model gaussian --shared" ;;
         wide) echo "--delay 40ms --jitter 40ms --jitter-model gaussian --shared" ;;
-        bursty | step) echo "--profile $1" ;;
-        congestion) echo "--profile $AQ_DIR/congestion.toml" ;;
+        bursty | step | congestion) echo "--profile $1" ;;
     esac
 }