Support cache for `_is_annotation`

[wanglec]

Is your feature request related to a problem? Please describe. We want to add the cache functionality for the function _is_annotation. It should remember whether the entry is annotated-like once it has been checked.

Depends on

• List issues that this one depends on.

Describe the solution you'd like We may use a lru decorator to cache the return value of this function.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context

• This is part of the data efficiency project
• This PR should be made to the master branch.
• After the data tuple class is finished, we may switch to a new branch for integration.

[hunterhector]

@mylibrar double check to see if this is addressed, or assign a milestone

[hunterhector]

addressed in another pr.