Display metadata in the table

[akirk]

Fixes #947.

The metadata that can be stored along side records is burried in the stream_meta table. This make the data accessible in the table.

Checklist

• I have tested the changes in the local development environment (see contributing.md).
• I have added phpunit tests.

I have run the code. I am unable to run the local development environment on a recent Macbook Pro. Maybe the environment should be updated in a separate PR.

Error: Cask virtualbox depends on hardware architecture being one of [{:type=>:intel, :bits=>64}], but you are running {:type=>:arm, :bits=>64}.

Thus, I have also not been able to check the unit tests yet.

Release Changelog

• New: Expose stream metadata in the admin UI.

Release Checklist

• This pull request is to the master branch.
• Release version follows semantic versioning. Does it include breaking changes?
• Update changelog in readme.txt.
• Bump version in stream.php.
• Bump Stable tag in readme.txt.
• Bump version in classes/class-plugin.php.
• Draft a release on GitHub.

Change [ ] to [x] to mark the items as done.

[akirk]

@kasparsd any chance of getting this merged? I've rebased this on the current release, it still works.

[hokoo]

Nice to have an option like "Retrieve meta data to display" in order to not overload DB when it is not needed.