chore(swift): point Package.swift at the swift-host-v0.14.0-4 xcframework + over-budget test (#1615)

[enricopiovesan]

Summary

This points packages/swift/TraverseEmbedder/Package.swift at the rebuilt swift-host-v0.14.0-4 xcframework, which includes #1619 (Spec 074 FR-003, #1615). It also adds the Swift package test that #1615's DoD requires.

• In this binary the Swift host classifies guest traps by their typed wasmi trap code:
  • fuel exhaustion → RESOURCE_LIMIT (-4) / bridge_timeout;
  • a refused memory growth → -4 / bridge_resource_limit;
  • any other trap → -5 / bridge_trap.
• New overBudgetInvocationReportsAStableTimeout (swift-testing) runs the bundled client_bridge.wasm with fuelPerInvocation: 64. That is enough to create the host (the ABI probe costs fuel; 32 and below fail at create), but initialize then throws TraverseBridgeError(status: -4, code: "bridge_timeout") instead of the old -5 / bridge_trap.
• The release workflow published the artifact (run 37061502210) and pushed this branch. As before, it can't open PRs in this repo, so the PR is opened by hand.

Governing Spec

• 136-native-embedder-publication
• 074-swift-native-resource-control-certification

Project Item

Closes #1615 (the last DoD item: a Swift package test covering an over-budget invocation).

Validation

• The checksum 959fd005…dcca4d2 equals the asset digest GitHub reports for swift-host-v0.14.0-4/TraverseSwiftHost.xcframework.zip.
• On this branch, after clearing the cached artifact, swift test passes: XCTest 8/8 and swift-testing 48/48, including the new test and the app state-machine golden ([Task]: Cross-platform ordered state/event conformance for app commands and host authorities #1502).

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