Add capability to query deployed commits 📦

[hackebrot]

This PR introduces the ability to retrieve all commits included in a given deployment, addressing a key requirement for accurately measuring Lead Time for Changes in Four Keys.

Key Changes

• Added GitHub REST API integration for comparing commits (with support for paginated responses)
• Rearchitected GitHub code to enable package consumers to select which API to use for higher level operations
• Added higher level function for querying deployed commits for a given deployment
• Introduced structured logging to both the metrics CLI app as well as the github package

Recommended review order

1. go.mod and go.sum for new github.com/google/go-github/v68 dependency
2. Files under pkg/github/rest/ with new GitHub REST API code
3. Files under pkg/github/graphql/ with updated GitHub GraphQL API code
4. Changes for pkg/github/*.go with higher-level GitHub API code
5. Files under pkg/github/internal/test/ with test framework for pkg/github
6. Files under metrics/internal/factory/ for refactored factory code
7. CLI app changes in metrics/cmd/**/*.go
8. Remaining files in metrics/

Jira ticket

CICD-441

Issues

Resolve #19
Resolve #30
Resolve #33

Notes

Note: AI tools were used in generating this pull request 🤖

[gdover9]

Is there a reason for a 250 commit limit?

[hackebrot]

Good question! At the time I've added that check, the internal REST API client didn't support pagination yet:
https://github.com/mozilla-services/rapid-release-model/pull/35/files#diff-7525bc78a0e3497bcd41a5862aed2f3e47732af92fe2e4be04f92132aecba748R12-R23

We can probably drop that upper limit.

[gdover9]

Cool! 😄

[gdover9]

Code looks absolutely fantastic! Will do some testing shortly but I don't see any issues - thank you for working so much on this!

[gdover9]

All looks good in terms of *.json, *.csv and *_test.go files not including sensitive information!

[gdover9]

Have tested deployments --commits and deployed-commits commands on multiple repos and environments and all seems to be correct in terms of data returned :)

[hackebrot]

Thanks for the reviews, folks! 📦 🚀