Parse allure.id from Swift Testing comments

[BorisLys]

Summary

Swift Testing serializes trait comments into ActionTestSummary.documentation._values[].content._value, separately from activitySummaries. The existing parser only inspected activity titles (the XCTest path via XCTContext.runActivity), so allure.id traits on Swift Testing tests were silently dropped.

This change reads the documentation field on each test summary and extracts allure.id:<n> into the AS_ID label using the same regex as the XCTest path. XCTest behavior is unchanged.

Scope: only allure.id. Other allure.* patterns (name/description/label/link) are intentionally out of scope for this PR.

Usage

Define a Swift Testing trait that wraps the id as a Comment:

import Testing

public struct AllureIdTrait: TestTrait, SuiteTrait {
    private let id: Int

    public var comments: [Comment] {
        [Comment(rawValue: "allure.id:\(id)")]
    }

    public init(_ id: Int) {
        self.id = id
    }
}

extension Trait where Self == AllureIdTrait {
    public static func allureId(_ id: Int) -> Self {
        .init(id)
    }
}

Apply it to a test:

@Test(.allureId(1234))
func example() {
    // ...
}

After running the test suite and exporting the xcresult:

xcresults export Test.xcresult ./allure-results

The resulting *-result.json now contains the AS_ID label:

{
  "name": "example()",
  "fullName": "SwiftRadioTests/example()",
  "labels": [
    { "name": "AS_ID", "value": "1234" },
    { "name": "suite", "value": "SwiftRadioTests" }
  ]
}

Test plan

• Verified on a real Xcode 16 xcresult bundle containing a Swift Testing test annotated with .allureId(1234) — AS_ID=1234 appears in the exported JSON
• Regression: XCTest test using XCTContext.runActivity(named: "allure.id:N") still produces the same AS_ID label as before