Add a deterministic Revolve case to the CAD corpus

[protosphinx]

Why this matters

The hand-auditable CAD corpus covers Boolean, Fillet, Shell, Loft, Sweep, and patterned Cut, but it does not contain a dedicated Revolve case.

Scope

• Add one schema-5 part fixture using the existing advanced profile-sketch contract accepted by Revolve, an axis datum, a Revolve feature, and one resulting body.
• Do not implement the roadmap's currently unsupported first-class constrained-sketch Revolve path in this issue.
• Add at least two safe cumulative parameter mutations, such as profile size and partial sweep angle.
• Declare evaluated and reused features explicitly in the manifest.
• Update the corpus README inventory.
• Keep the case small enough to inspect by hand.

Relevant files

• tests/cad-corpus/revolve-profile.partmode.json
• tests/cad-corpus/manifest.json
• tests/cad-corpus/README.md

Acceptance evidence

• Base and mutated documents round-trip canonically with stable SHA-256 hashes.
• Every variant produces exactly one valid OCCT solid with positive volume.
• Face, edge, and vertex names are complete and stable across safe mutations.
• Warm incremental evaluation and the declared dirty feature set are proven.
• Exact geometry evidence is required; screenshots, mesh counts, or schema declarations alone do not satisfy the issue.

Test commands

npm run build
npm run smoke:cad-regression
npm run smoke:feature-registry-runtime
npm run ci:gate

Contribution size

S: one compact fixture using an existing feature contract, two mutations, and manifest documentation.

Maintainer response expectation

Comment with the proposed fixture before starting. A maintainer will confirm that the existing Revolve contract and corpus scope are being used.