Feat: Add annotations query support

[alexluck-sift]

Pull Request

Description

Adds annotation query support based on:

• Sift Annotations
• Data values (each returned time/value will be returned as a single Grafana annotation)

Type of change

Please check the boxes that apply to this pull request.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

• Test A
• Test B

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Screenshots (if applicable)

Using Sift data queries:

Using Sift annotations:

[broch-sift]

FE LGTM, but will defer to BE approval

[solidiquis]

approve with take it or leave it nit