Build notification is late

[MahdiBM]

Describe the bug
It appears the notification for building stuff does not appear before the build logs contain "Building for debugging/release..." which is when the [num/num] progress indicator starts to show up. That can take a bit to show up so makes the notification a bit inaccurate.

To Reproduce

• Open vapor/penny-bot.
• Set Swift: Show Build Status to notification.
• Build.

Expected behavior
show something like "starting build" instead of not showing the notification at all.

Environment

• OS: [e.g. Ubuntu 20.04] macOS 15.2
• Swift version (output of swift --version): 6.0.3 release
• Visual Studio Code version: -
• vscode-swift version: 1.11.4

Additional context

[MahdiBM]

Reading the extension code, I think it's important to mention what was being logged when the build notification was late:

Executing task: swift: Building and Running Tests 

> /Applications/Xcode 16.2 beta 3.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift test --enable-swift-testing --event-stream-version 0 --event-stream-output-path /var/folders/rr/9nl0rwsx2dlcwd49g83wp_jr0000gn/T/vscodemkfifo-1737444536945 --disable-xctest --filter PennyTests\.GHHooksTests\/handlePREvent14\(\)\/ -Xswiftc -diagnostic-style=llvm --force-resolved-versions --disable-xctest

warning: 'swift-evolution-metadata-extractor': 'swift-evolution-metadata-extractor' dependency on 'https://github.com/swiftlang/swift-markdown' conflicts with dependency on 'https://github.com/apple/swift-markdown.git' which has the same identity 'swift-markdown'. this will be escalated to an error in future versions of SwiftPM.
warning: 'leaf-kit': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /Users/mahdibm/Github/penny-bot/.build/checkouts/leaf-kit/Sources/LeafKit/Docs.docc
warning: 'swift-algorithms': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /Users/mahdibm/Github/penny-bot/.build/checkouts/swift-algorithms/Sources/Algorithms/Documentation.docc
Building for debugging...
[68/68] Linking PennyPackageTests
Build complete! (61.36s)
◇ Test run started.
↳ Testing Library Version: 102 (arm64e-apple-macos13.0)
◇ Suite GHHooksTests started.
◇ Test "PR with [DNM] prefix where author_association is CONTRIBUTOR should not be posted to Discord" started.
✔ Test "PR with [DNM] prefix where author_association is CONTRIBUTOR should not be posted to Discord" passed after 1.081 seconds.
✔ Suite GHHooksTests passed after 1.083 seconds.
✔ Test run with 1 test passed after 1.087 seconds.

[award999]

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