The naive split(":").pop() approach treated the port number in
registry URLs (e.g. registry:5000/image) as the image tag.
Now uses lastIndexOf(":") and checks if the suffix matches a port
followed by a path (digits + slash), consistent with extractImageName.
Closes#4082
- Added functions to extract image name and tag from Docker images and webhook requests.
- Implemented validation for Docker image names and tags during deployment.
- Expanded test coverage for image tag extraction and commit message generation for GitHub Packages events.
- Improved error handling for missing image names and tags in deployment requests.