feat: only send one digest email per org with all team info

[raquelmsmith]

Problem

For orgs with multiple teams, sending an email per team was overwhelming.

Changes

• Collects all team info first
• Organizes it into organizations
• For each user, filters the reports to include only the teams they are members of
• Sends the filtered org report for each user

I'm somewhat concerned about memory utilization with this approach because we're now keeping a lot more in memory than we were before. So any suggestions there are welcome - otherwise we will just see how it goes.

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

Does this work well for both Cloud and self-hosted?

Should..

How did you test this code?

Updated tests

[greptile-apps]

PR Summary

This PR consolidates multiple team digest emails into a single organization-wide email, improving the notification experience for organizations with multiple teams while maintaining proper access controls.

• Introduced new OrgDigestReport and TeamDigestReport data classes in report_utils.py to structure organization-level reporting
• Added user-specific report filtering in periodic_digest.py to ensure users only see data from teams they have access to and notifications enabled for
• Implemented organization-level idempotency using MessagingRecord with campaign keys that include period length
• Added comprehensive test coverage in test_periodic_digest.py for multi-team scenarios, access controls, and notification preferences
• Potential memory concern with upfront data loading for large organizations, as noted in PR description

_{💡 (1/5) You can manually trigger the bot by mentioning @greptileai in a comment!}

_{3 file(s) reviewed, 4 comment(s)
Edit PR Review Bot Settings | Greptile}

[greptile-apps]

logic: using first team arbitrarily could cause issues if that team has different settings or configuration than other teams in the org - consider using a more deterministic selection method

[joethreepwood]

Going to remove my review and subscribe instead. I can follow the summary, but actually approving code like this is a bit of a stretch for me!

[joshsny]

Looks great 🚢