fix: preserve durable setup metadata in Platform SDK

[alongubkin]

Summary

• regenerate the checked-in Platform OpenAPI artifacts from the authoritative Platform schema
• preserve durable setup revision metadata through generated reconciliation requests
• add a regression for the generated SDK serialization boundary

Validation

• cargo test -p alien-platform-api reconcile_state_preserves_runtime_update_metadata
• repository generator is idempotent over the checked-in artifacts

[greptile-apps]

Greptile Summary

This PR regenerates the Platform OpenAPI artifacts so generated Rust reconciliation requests preserve durable setup revision metadata.

• Adds nullable directSetupRevision metadata consistently across the Platform and Rust OpenAPI inputs.
• Extends the Rust SDK regression test to verify the metadata survives the serialization boundary.

Confidence Score: 5/5

The PR appears safe to merge, with no concrete blocking or independently actionable non-blocking issue identified in its intended Rust SDK scope.

The regenerated schema artifacts consistently introduce the nullable metadata field, and the regression covers its preservation through the generated Rust reconciliation serialization boundary.

Important Files Changed

Filename	Overview
client-sdks/platform/openapi.json	Regenerates the shared Platform contract with nullable durable setup revision metadata.
client-sdks/platform/rust/openapi.json	Aligns the Rust generator input with the regenerated Platform contract.
client-sdks/platform/rust/openapi-3.0.json	Aligns the OpenAPI 3.0 Rust generator artifact with the same runtime metadata field.
client-sdks/platform/rust/src/lib.rs	Adds a focused regression assertion proving the generated reconciliation state retains the setup revision.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  A[Authoritative Platform schema] --> B[Checked-in Platform OpenAPI]
  B --> C[Rust SDK generated model]
  D[Deployment state with directSetupRevision] --> C
  C --> E[Reconciliation request]
  E --> F[Serialized runtime metadata preserves revision]

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