Work on failed outbound requests and move type migrators

- DB type migrators are now in separate file, in preparation for full
  custom sql migration statements
- Start work on handling failed outbound requests stored in the db

storage-new/dbgen/failed_outbound_requests.gen.go

@@ -7,6 +7,7 @@ package dbgen
 import (
 	"context"
 	"database/sql"
+	"strings"
 
 	"git.mstar.dev/mstar/linstrom/storage-new/models"
 	"gorm.io/gorm"
@@ -607,6 +608,34 @@ type IFailedOutboundRequestDo interface {
 	Returning(value interface{}, columns ...string) IFailedOutboundRequestDo
 	UnderlyingDB() *gorm.DB
 	schema.Tabler
+
+	KillServers(maxAttempts uint32) (err error)
+}
+
+// KillServers marks all servers where a request has more than X failed attempts as dead
+//
+// WITH servers_to_kill AS (
+//
+//	SELECT target_server_id
+//	FROM failed_outbound_requests
+//	WHERE nr_of_attempts > @maxAttempts
+//
+// )
+// UPDATE remote_servers
+// SET is_dead = true
+// WHERE id IN (SELECT target_server_id FROM servers_to_kill)
+func (f failedOutboundRequestDo) KillServers(maxAttempts uint32) (err error) {
+	var params []interface{}
+
+	var generateSQL strings.Builder
+	params = append(params, maxAttempts)
+	generateSQL.WriteString("WITH servers_to_kill AS ( SELECT target_server_id FROM failed_outbound_requests WHERE nr_of_attempts > ? ) UPDATE remote_servers SET is_dead = true WHERE id IN (SELECT target_server_id FROM servers_to_kill) ")
+
+	var executeSQL *gorm.DB
+	executeSQL = f.UnderlyingDB().Exec(generateSQL.String(), params...) // ignore_security_alert
+	err = executeSQL.Error
+
+	return
 }
 
 func (f failedOutboundRequestDo) Debug() IFailedOutboundRequestDo {