feat(GtxMessagingService): Zwischenspeicherung für SMS-Code und Ablauf des SMS-Codes mittels Envelope-Receiver-ID hinzugefügt

- Erweiterungsmethode für Zeitcaching hinzugefügt.

EnvelopeGenerator.Application/Configurations/GtxMessaging/SmsParams.cs

@@ -1,4 +1,5 @@
 using DigitalData.Core.Abstractions.Client;
+using Microsoft.Extensions.Caching.Distributed;
 
 namespace EnvelopeGenerator.Application.Configurations.GtxMessaging
 {
@@ -20,5 +21,19 @@ namespace EnvelopeGenerator.Application.Configurations.GtxMessaging
         public string MessageQueryParamName { get; init; } = "text";
 
         public int CodeLength { get; init; } = 5;
+
+        /// <summary>
+        /// Gets the cache key format for SMS codes.
+        /// The placeholder {0} represents the envelopeReceiverId.
+        /// </summary>
+        public string CodeCacheKeyFormat { get; init; } = "sms-code-{0}";
+
+        /// <summary>
+        /// Gets the cache expiration key format for SMS codes.
+        /// The placeholder {0} represents the envelopeReceiverId.
+        /// </summary>
+        public string CodeExpirationCacheKeyFormat { get; init; } = "sms-code-expiration-{0}";
+
+        public TimeSpan CodeCacheValidityPeriod { get; init; } = new(0, 5, 0);
     }
 }