fix: alert cron schedules

[anirudhpillai]

Problem

Error in frequency of previous cron tab for alerts

Changes

• Fixed cron + combined the schedules
• Fix link in email
• Show insight derived name as backup if no name specified

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

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

N/A

How did you test this code?

[github-actions]

Size Change: 0 B

Total Size: 9.21 MB

ℹ️ View Unchanged

Filename	Size
frontend/dist/toolbar.js	9.21 MB

_{compressed-size-action}

[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

• chromium: 0 added, 2 modified, 0 deleted (diff for shard 2)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

• chromium: 0 added, 2 modified, 0 deleted (wasn't pushed!)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.