Cooklang scale (parked): persist scaled view in graph.json

[drawmeanelephant]

Status

Parked. Do not start unless a consumer cannot live with the S2 command and someone authorizes an IR bump. Not implied by S1–S3.

Parent: #554.

Why it is parked

S1 and S2 keep authored graph.json quantities as the strings the author wrote. The scaled view is derived and printed. That is load-bearing:

• The 0.4 recipe facet schema is additionalProperties: false. Adding class / scaled on cookQuantity is a breaking schema change unless schemaVersion moves.
• Putting a factor into every IR build would force every Cooklang compile to pick a factor (default 1 is noise; anything else is a new input).
• The editor and other consumers can call boris recipe-scale when they want a scale.

If authorized later

• Bump the recipe IR (likely 0.5.0) and the compiler id suffix contract.
• Decide whether the persisted view is (a) classification only (empty / scalable / fixed on each amount) or (b) a scaled overlay that also records the factor.
• Keep .cook canonical. Do not replace authored amounts with scaled ones in graph.json.
• Update test-ir-schema, fixtures, and the editor adapter’s accepted IR versions.

Non-goals even then

• Do not silently reshape 0.4.0.
• Do not write scaled amounts back into source.

Default

Leave quantities as authored strings. Scale is a command, not a compile side effect.

[drawmeanelephant]

Parked on the #554 map. Not implied by #595–#597.