Added multiple attempts with backoff delay to datebase connection

helpers/backoff.go

@@ -0,0 +1,18 @@
+package helpers
+
+import (
+	"math"
+	"time"
+
+	"git.fjla.uk/owlboard/timetable-mgr/log"
+	"go.uber.org/zap"
+)
+
+// Implements an exponential backoff strategy and sleeps for a duration calculated as 1 second to the power of (attempt - 1).
+// The backoff time doubles with each attempt, starting from 1 second for the first attempt.
+func BackoffDelay(attempt int) {
+	base := time.Second
+	backoff := base * time.Duration(math.Pow(2, float64(attempt-1)))
+	log.Info("Retry backoff", zap.Duration("delay", backoff))
+	time.Sleep(backoff)
+}