chore: add sqlite init and config, add repository for sql

backend/internal/utils/token_gen.go

@@ -0,0 +1,14 @@
+package initial
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+)
+
+func RandomToken() (string, error) {
+	token := make([]byte, 32)
+	if _, err := rand.Read(token); err != nil {
+		return "", err
+	}
+	return hex.EncodeToString(token), nil
+}