Route GORM's logger through slog and bound it (closes #178)

internal/database/webhook_db_manager.go

@@ -14,6 +14,7 @@ import (
 	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
 	"sneak.berlin/go/webhooker/internal/config"
+	"sneak.berlin/go/webhooker/internal/gormlog"
 	"sneak.berlin/go/webhooker/internal/logger"
 )
 
@@ -248,7 +249,10 @@ func (m *WebhookDBManager) openDB(
 
 	db, err := gorm.Open(sqlite.Dialector{
 		Conn: sqlDB,
-	}, &gorm.Config{})
+	}, &gorm.Config{
+		// Never leave this at GORM's default. See internal/gormlog.
+		Logger: gormlog.New(m.log),
+	})
 	if err != nil {
 		_ = sqlDB.Close()