feat(braze): add Braze tempo-locked beating

Adds a detuned copy of the bass whose beating stays on the tempo grid on
every note. The chosen harmonic k beats once per Rate note value, and
harmonic n beats n/k times as fast, so every harmonic is on the grid.

- The copy is read from a delay line whose delay falls one period of the
  tracked note per beat cycle (r = 1 + B/(k f0)) and jumps back exactly
  one period, crossfaded over 6 ms. On a periodic note the jump has no
  seam: the output matches the ideal sum within 0.003 on harmonics 1-4.
- The delay follows the host's beat position, shifted by the lookahead,
  so beat peaks land on the grid; free-running when stopped.
- Low cut: LR4 high-pass on the copy, the bass split by the same
  crossover, so the sub does not beat and keeps its level.
- Depth, Width, Phase, Gate, Output, Snap, Bypass. Pitch from audio
  (about 67 ms lookahead) or MIDI.
- Editor: one bar of the beat per harmonic with the grid and a playhead.
- Catalog, workflows, editor-check, docs, signal chain and site copy.

docs/development.md

@@ -25,7 +25,7 @@ Patina has `render` for offline WAV evaluation. The shared crates are:
 
 - `common-ui`: palette, embedded fonts, header, panels, knobs, meters.
 - `common-dsp`: filters, YIN pitch tracking, the note tracker used by Anvil,
-  Lathe, Temper, Knurl and Planish, 4× oversampling, meters and WAV files.
+  Lathe, Temper, Knurl, Planish and Braze, 4× oversampling, meters and WAV files.
 
 The wrappers stay separate workspaces, each with its own lockfile, so the
 NIH-plug Git dependency stays out of the root workspace. Host identities and
@@ -45,7 +45,7 @@ python3 -m unittest discover -s scripts/tests -v
 ```
 
 Products: `rivet`, `patina`, `anvil`, `crucible`, `lathe`, `temper`, `weld`,
-`knurl`, `planish`.
+`knurl`, `planish`, `braze`.
 
 `check-plugin.py` runs formatting, tests and clippy for one product's packages
 and its wrapper, without compiling the other products. Run it for every product
@@ -145,6 +145,7 @@ identify plugins by CLAP ID, so the vendor name does not affect saved projects.
 | Weld | (new) | `io.narl.bass-foundry.weld` |
 | Knurl | (new) | `io.narl.bass-foundry.knurl` |
 | Planish | (new) | `io.narl.bass-foundry.planish` |
+| Braze | (new) | `io.narl.bass-foundry.braze` |
 
 CLAP IDs use the form `io.narl.bass-foundry.<product>`. Builds tagged before
 this scheme used `io.storyboard.*` IDs; hosts treat the new IDs as different