Add support for ГОСТ Р 34.10 digital signatures

- Implemented the GostKeyValue class for handling public key parameters in ГОСТ Р 34.10 digital signatures.
- Created the GostSignedXml class to manage XML signatures using ГОСТ 34.10, including methods for computing and checking signatures.
- Developed the GostSignedXmlImpl class to encapsulate the signature computation logic and public key retrieval.
- Added specific key value classes for ГОСТ Р 34.10-2001, ГОСТ Р 34.10-2012/256, and ГОСТ Р 34.10-2012/512 to support different signature algorithms.
- Ensured compatibility with existing XML signature standards while integrating ГОСТ cryptography.

src/Concelier/StellaOps.Concelier.WebService/Options/ConcelierOptions.cs

@@ -169,5 +169,7 @@ public sealed class ConcelierOptions
         public int DefaultMinimumLength { get; set; } = 64;
 
         public int MaxMinimumLength { get; set; } = 512;
+
+        public int CacheDurationSeconds { get; set; } = 30;
     }
 }