This migration converts all tailnet coordination tables to UNLOGGED:
- `tailnet_coordinators`
- `tailnet_peers`
- `tailnet_tunnels`
UNLOGGED tables skip Write-Ahead Log (WAL) writes, significantly
improving performance for high-frequency updates like coordinator
heartbeats and peer state changes.
The trade-off is that UNLOGGED tables are truncated on crash recovery
and are not replicated to standby servers. This is acceptable for these
tables because the data is ephemeral:
1. Coordinators re-register on startup
2. Peers re-establish connections on reconnect
3. Tunnels are re-created based on current peer state
**Migration notes:**
- Child tables must be converted before the parent table because LOGGED
child tables cannot reference UNLOGGED parent tables (but the reverse is
allowed)
- The down migration reverses the order: parent first, then children
Fixes https://github.com/coder/coder/issues/21333
Spike Curtis
f358a6db11