Correct the lens first and settle the grain last

`Attribute::ALL` has claimed since it was written to be roughly the order a
photographer works in, and 474dcf0 moved `Compose` to the front on exactly that
argument. Both ends went on contradicting it.

`Optics` sat fifth, so the column offered the lens corrections after the tones
they change. Removing a vignette brightens the frame; an exposure judged before
that correction has to be judged again after it, which is the definition of the
wrong order. `Detail` sat fourth, so sharpening and noise reduction — the only
work here that depends on everything above it, and the only work that cannot be
judged at fit view at all — were offered before the lens had even been put
right.

So `Optics, Compose, Tone, Colour, Effect, Detail`. `Optics` leads even
`Compose` because it is not a decision about the photograph at all: it is
undoing what the equipment did, a property of the capture rather than a choice.
`Effect` after `Colour` is a look laid over a settled picture, and is the one
slot that is genuinely arguable — a spectral film simulation declares `renders`
and replaces the base curve, which is a case for treating it as foundational
instead, and e235e99 filed film under `Effect` only days ago. The doc comment
records that tension rather than pretending to settle it; an array of six
cannot say "last, except when it is first".

`decl::Attr::ALL` moves with it. It is the second spelling of one vocabulary,
compiled by `build.rs` where `descriptor` is not visible, and the agreement
test in `declared/mod.rs` zips the two positionally — that test is what caught
the last reorder, and it would have caught this one.

Nothing persists a position in this list, which is what makes the reorder safe
rather than merely tidy. `Scope` packs one bit per attribute indexed by
`Attribute::ALL`, but `bits` is private, has no accessor and no `serde`; what
reaches a settings file is `develop.copy_attributes`, a list of names read back
through `Attribute::from_name`. A photographer's copy scope survives untouched
— only the order the names happen to be written in changes.

6a97fdf is why this is worth a commit now rather than a shrug: the
contradiction was harmless while the list only fed a row of chips nobody reads
in order, and stopped being harmless when the same list began driving a column
read top to bottom.

The matrix follows the two files' shifted line numbers.

docs/traceability.md

@@ -112,8 +112,8 @@ _None._
 | FR-PLAT-AND-6 | [`apps/darkroom-android/src/lib.rs:388`](../apps/darkroom-android/src/lib.rs#L388) |
 | FR-PLAT-LIN-1 | [`core/dr-types/src/settings.rs:1`](../core/dr-types/src/settings.rs#L1), [`platform/dr-plat/src/storage.rs:344`](../platform/dr-plat/src/storage.rs#L344), [`ui/dr-ui/src/lib.rs:999`](../ui/dr-ui/src/lib.rs#L999), [`ui/dr-ui/src/preset_store.rs:1`](../ui/dr-ui/src/preset_store.rs#L1), [`ui/dr-ui/src/settings_store.rs:1`](../ui/dr-ui/src/settings_store.rs#L1) |
 | FR-PLAT-LIN-2 | [`platform/dr-plat/src/display.rs:1`](../platform/dr-plat/src/display.rs#L1), [`platform/dr-plat/src/display/wayland.rs:1`](../platform/dr-plat/src/display/wayland.rs#L1), [`platform/dr-plat/src/display/x11.rs:1`](../platform/dr-plat/src/display/x11.rs#L1) |
-| FR-PLG-2 | [`core/dr-pipeline/src/declared/decl.rs:1`](../core/dr-pipeline/src/declared/decl.rs#L1), [`core/dr-pipeline/src/declared/expr.rs:152`](../core/dr-pipeline/src/declared/expr.rs#L152), [`core/dr-pipeline/src/declared/expr.rs:1`](../core/dr-pipeline/src/declared/expr.rs#L1), [`core/dr-pipeline/src/declared/mod.rs:1`](../core/dr-pipeline/src/declared/mod.rs#L1), [`core/dr-pipeline/src/declared/mod.rs:82`](../core/dr-pipeline/src/declared/mod.rs#L82), [`core/dr-pipeline/src/descriptor.rs:15`](../core/dr-pipeline/src/descriptor.rs#L15), [`core/dr-pipeline/src/descriptor.rs:674`](../core/dr-pipeline/src/descriptor.rs#L674), [`core/dr-pipeline/src/operation.rs:232`](../core/dr-pipeline/src/operation.rs#L232), [`core/dr-pipeline/tests/declared_parity.rs:1`](../core/dr-pipeline/tests/declared_parity.rs#L1), [`core/dr-pipeline/tests/declared_parity.rs:240`](../core/dr-pipeline/tests/declared_parity.rs#L240), [`core/dr-pipeline/tests/declared_parity.rs:305`](../core/dr-pipeline/tests/declared_parity.rs#L305), [`core/dr-pipeline/tests/declared_parity.rs:358`](../core/dr-pipeline/tests/declared_parity.rs#L358), [`core/dr-pipeline/tests/declared_parity.rs:417`](../core/dr-pipeline/tests/declared_parity.rs#L417) |
-| FR-PLG-2d | [`core/dr-pipeline/src/declared/decl.rs:112`](../core/dr-pipeline/src/declared/decl.rs#L112), [`core/dr-pipeline/src/declared/decl.rs:152`](../core/dr-pipeline/src/declared/decl.rs#L152), [`core/dr-pipeline/src/declared/decl.rs:1`](../core/dr-pipeline/src/declared/decl.rs#L1), [`core/dr-pipeline/src/declared/decl.rs:420`](../core/dr-pipeline/src/declared/decl.rs#L420), [`core/dr-pipeline/src/declared/decl.rs:67`](../core/dr-pipeline/src/declared/decl.rs#L67), [`core/dr-pipeline/src/declared/mod.rs:1`](../core/dr-pipeline/src/declared/mod.rs#L1), [`core/dr-pipeline/src/declared/mod.rs:384`](../core/dr-pipeline/src/declared/mod.rs#L384), [`core/dr-pipeline/src/declared/mod.rs:403`](../core/dr-pipeline/src/declared/mod.rs#L403) |
+| FR-PLG-2 | [`core/dr-pipeline/src/declared/decl.rs:1`](../core/dr-pipeline/src/declared/decl.rs#L1), [`core/dr-pipeline/src/declared/expr.rs:152`](../core/dr-pipeline/src/declared/expr.rs#L152), [`core/dr-pipeline/src/declared/expr.rs:1`](../core/dr-pipeline/src/declared/expr.rs#L1), [`core/dr-pipeline/src/declared/mod.rs:1`](../core/dr-pipeline/src/declared/mod.rs#L1), [`core/dr-pipeline/src/declared/mod.rs:82`](../core/dr-pipeline/src/declared/mod.rs#L82), [`core/dr-pipeline/src/descriptor.rs:15`](../core/dr-pipeline/src/descriptor.rs#L15), [`core/dr-pipeline/src/descriptor.rs:695`](../core/dr-pipeline/src/descriptor.rs#L695), [`core/dr-pipeline/src/operation.rs:232`](../core/dr-pipeline/src/operation.rs#L232), [`core/dr-pipeline/tests/declared_parity.rs:1`](../core/dr-pipeline/tests/declared_parity.rs#L1), [`core/dr-pipeline/tests/declared_parity.rs:240`](../core/dr-pipeline/tests/declared_parity.rs#L240), [`core/dr-pipeline/tests/declared_parity.rs:305`](../core/dr-pipeline/tests/declared_parity.rs#L305), [`core/dr-pipeline/tests/declared_parity.rs:358`](../core/dr-pipeline/tests/declared_parity.rs#L358), [`core/dr-pipeline/tests/declared_parity.rs:417`](../core/dr-pipeline/tests/declared_parity.rs#L417) |
+| FR-PLG-2d | [`core/dr-pipeline/src/declared/decl.rs:112`](../core/dr-pipeline/src/declared/decl.rs#L112), [`core/dr-pipeline/src/declared/decl.rs:154`](../core/dr-pipeline/src/declared/decl.rs#L154), [`core/dr-pipeline/src/declared/decl.rs:1`](../core/dr-pipeline/src/declared/decl.rs#L1), [`core/dr-pipeline/src/declared/decl.rs:422`](../core/dr-pipeline/src/declared/decl.rs#L422), [`core/dr-pipeline/src/declared/decl.rs:67`](../core/dr-pipeline/src/declared/decl.rs#L67), [`core/dr-pipeline/src/declared/mod.rs:1`](../core/dr-pipeline/src/declared/mod.rs#L1), [`core/dr-pipeline/src/declared/mod.rs:384`](../core/dr-pipeline/src/declared/mod.rs#L384), [`core/dr-pipeline/src/declared/mod.rs:403`](../core/dr-pipeline/src/declared/mod.rs#L403) |
 | FR-PLG-8 | [`core/dr-pipeline/src/sidecar.rs:1924`](../core/dr-pipeline/src/sidecar.rs#L1924), [`core/dr-pipeline/src/sidecar.rs:1957`](../core/dr-pipeline/src/sidecar.rs#L1957) |
 | FR-RAW-1 | [`core/dr-decode/src/lib.rs:243`](../core/dr-decode/src/lib.rs#L243), [`core/dr-types/src/lib.rs:132`](../core/dr-types/src/lib.rs#L132), [`core/dr-types/src/lib.rs:203`](../core/dr-types/src/lib.rs#L203) |
 | FR-RAW-3 | [`core/dr-decode/src/lib.rs:139`](../core/dr-decode/src/lib.rs#L139), [`core/dr-decode/src/lib.rs:506`](../core/dr-decode/src/lib.rs#L506), [`core/dr-decode/src/locate.rs:1366`](../core/dr-decode/src/locate.rs#L1366) |