Retry monitoring TG database connection on startup

cmd/classifier/main.go

@@ -15,6 +15,7 @@ import (
 	"time"
 
 	"monitoring-tg/internal/aiservice"
+	"monitoring-tg/internal/dbretry"
 
 	"github.com/jackc/pgx/v5/pgxpool"
 )
@@ -69,7 +70,7 @@ func main() {
 	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
 	defer stop()
 
-	pool, err := pgxpool.New(ctx, cfg.databaseURL())
+	pool, err := dbretry.Connect(ctx, cfg.databaseURL(), 2*time.Minute)
 	if err != nil {
 		slog.Error("db_connect_failed", "error", err)
 		os.Exit(1)