feat(coderd/database): add dbrollup service to rollup insights (#12665)

Add `dbrollup` service that runs the `UpsertTemplateUsageStats` query
every 5 minutes, on the minute. This allows us to have fairly real-time
insights data when viewing "today".

coderd/database/lock.go

@@ -6,10 +6,9 @@ import "hash/fnv"
 // change. If locks are deprecated, they should be kept in this list to avoid
 // reusing the same ID.
 const (
-	// Keep the unused iota here so we don't need + 1 every time
-	lockIDUnused = iota
-	LockIDDeploymentSetup
+	LockIDDeploymentSetup = iota + 1
 	LockIDEnterpriseDeploymentSetup
+	LockIDDBRollup
 )
 
 // GenLockID generates a unique and consistent lock ID from a given string.