Bump IAG to 0.5.1

[Kyle-Ye]

Current binary version

0.4.1

Target binary version

0.5.1

Current source version

0.4.1-bugfix.2

Target source version

0.5.1

Upstream release or revision

https://github.com/jcmosc/Compute/tree/0.5.1

Upgrade motivation

• Picks up the pointer-arithmetic correction and the fix for stale graph edges during teardown.
• Includes preservation of the current subgraph across affected graph operations.
• Incorporates expanded Linux support and test coverage, including graph cycle printing, Core Foundation string bridging, autorelease-pool support, and crypto linkage.
• Aligns OpenSwiftUI's Compute binary and source pins on the same 0.5.1 release line.

Expected behavior and compatibility impact

Review graph lifecycle and teardown behavior, current-subgraph preservation, binary ABI and layout compatibility, Swift toolchain requirements, and Linux linkage changes. Compare IAG snapshots for newly passing, failing, skipped, or expected-failure cases.

Acceptance criteria

• Binary and source pins use the Compute 0.5.1 release from jcmosc/Compute.
• Compute-backed OpenSwiftUI targets and XCFramework slices build on supported platforms.
• Both IAG renderer configurations complete with expected results.
• Graph behavior and snapshot changes are reviewed and accounted for.

Additional context

The expected upgrade baseline is the jcmosc/Compute 0.5.1 tag, whose tagged commit is b66dc81e2d16687b83769c492cd22ab699f28c0b.

Upstream comparison: jcmosc/Compute@0.4.1...0.5.1

[jcmosc]

@Kyle-Ye FYI the latest version is now 0.5.1. Sorry about the churn!

[Kyle-Ye]

@Kyle-Ye FYI the latest version is now 0.5.1. Sorry about the churn!

Updated.