Short knob-grid labels for 43 parameter(s)

[charlesvestal]

Adds short_name to this module's parameters, so the Schwung knob grid can
label each cell with the word that identifies it rather than a squeezed
abbreviation of the full name.

Part of a fleet-wide pass over every catalogued module. Each name was chosen
by hand against the page it appears on: where a page is already called
"Filter Envelope", its cells say ATTACK and DECAY rather than F.ATK and FENVDEC.

What changes

• fizzik — 43 parameters labelled

Nothing else is touched: no version bump, no behaviour change, no new params.

fizzik — rendered

Left is what the grid draws today, right is with this change — 8 of 9 changed pages.

Before / after

page	key	grid drew	now draws
Main	rnd_patch	RPATCH	PATCH
Main	rnd_exc	REXCIT	EXCITE
Main	rnd_reson	RNDRES	RESON
Main	rnd_all	RNDALL	ALL
Main	ftype	FLTYPE	FILTER
Exciter	exc_mix	EXCMIX	MIX
Exciter	exc_reso	EXCRES	RESO
Exciter	vel_level	VELEV	LEVEL
Reson A	a_model	MODEA	MODEL
Reson A	a_struct	STRUCA	STRU

The page matters where a name repeats: the same role under two sections
gets the same short name, and the section it sits under is what tells
them apart.

The full name is not lost

A short name is what the cell says at rest. The moment a knob is
touched, the header shows that parameter's full name and its value —
so nothing becomes unidentifiable, it just stops being shouted at you
eight times on one page.

rnd_patch on Main: the cell reads PATCH at rest, and the header reads RND PATCH under the finger.

Safe to merge now

short_name is a new field — it lands in the next Schwung release. On the
currently released host (v0.12.1) it is simply ignored.

This was checked rather than assumed: for every file here, the v0.12.1
page planner was run against the module contract before and after the change
and asserted to produce byte-identical pages — same page count, same cells,
same order. Merging today changes nothing; the labels appear when users update.

If a label is wrong

These are suggestions from someone reading the grid, not from the person who
wrote the synth. Change any of them in this branch, or close it — no hard
feelings either way. Layout problems are a separate matter and will come as
their own issues.