Scanning projects can't handle circular references

[dalemyers]

Congratulations on version 3! Scanning for targets is a massive win for us as it's a bit of a nightmare keeping them up to date in the config file due to the size of our project.

Unfortunately, we've run into a bug with them. We've got several projects, and there are references between them (not good practice I know - it's something I'm working on). It seems that this isn't detected during the scan phase. Here's the verbose output:

periphery scan --config .periphery.yml --clean-build --verbose                                                                                                                                                                            [36ms]
[version] 3.0.1
[shell] swift -version
Apple Swift version 6.0.2 (swiftlang-6.0.2.1.2 clang-1600.0.26.4)
Target: arm64-apple-macosx15.0
* Inspecting project...
[shell] xcodebuild -version
Xcode 16.1
Build version 16B40
[xcode:workspace] Loading /path/to/our.xcworkspace
[xcode:project] Loading /path/to/project/A.xcodeproj
[xcode:project] Loading /path/to/project/B.xcodeproj
[xcode:project] Loading /path/to/project/C.xcodeproj
[xcode:project] Loading /path/to/project/A.xcodeproj
[xcode:project] Loading /path/to/project/B.xcodeproj
[xcode:project] Loading /path/to/project/D.xcodeproj
[xcode:project] Loading /path/to/project/A.xcodeproj
[xcode:project] Loading /path/to/project/B.xcodeproj
[xcode:project] Loading /path/to/project/E.xcodeproj
[xcode:project] Loading /path/to/project/A.xcodeproj
[xcode:project] Loading /path/to/project/B.xcodeproj
[xcode:project] Loading /path/to/project/D.xcodeproj
[xcode:project] Loading /path/to/project/E.xcodeproj
[xcode:project] Loading /path/to/project/A.xcodeproj
[xcode:project] Loading /path/to/project/B.xcodeproj
[xcode:project] Loading /path/to/project/D.xcodeproj
[xcode:project] Loading /path/to/project/E.xcodeproj

It then keeps repeating A, B, D, E over and over indefinitely.