add dry-run tag for testing

I'd like to be able to set this up to be run automatically by jenkins when we run the script to deploy a release. it would be great if there was a --dry-run flag that would increase the log verbosity and show what the resulting context of the release log would be via stdout for testing purposes

Start with the script entry point used to deploy a release and inspect how command-line flags, logging, and release-log output are handled. Define the --dry-run behavior around Jenkins use: increase verbosity, avoid the actual release action, and print the resulting release-log context to stdout; verify the existing release workflow still behaves normally.

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