# What this PR does
- Adds 10 minutes lock for acknowledge reminder task to prevent task
duplicates, that causes posting multiple reminder messages and flooding
in Slack threads.
- Adds a new signal for acknowledge reminder task instead of using
`alert_group_action_triggered_signal` since it is used only to post
reminder message in Slack thread and it's not needed to be processed by
other representatives
## Which issue(s) this PR closes
Related to https://github.com/grafana/oncall-private/issues/2953
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] Added the relevant release notes label (see labels prefixed w/
`release:`). These labels dictate how your PR will
show up in the autogenerated release notes.
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