# What this PR does
Similar to https://github.com/grafana/oncall/pull/5199
Converts follow char fields to primary key relationships on
`SlackChannel` table:
- `ResolutionNoteSlackMessage.channel_id` ->
`ResolutionNoteSlackMessage.slack_channel`
- `ChannelFilter.slack_channel_id` -> `ChannelFilter.slack_channel`
## 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.
