Implemented missing file handling endpoints

Added contract update endpoint

PostFundManagement.Application/Services/Grants/GrantsCacheService.cs

@@ -146,4 +146,31 @@ public sealed class GrantsCacheService(GrantsService service, IDistributedCache
 
             return Result.Ok(cached.FromJson<Contract[]>());
         }));
+
+    public async ValueTask<Result<string>> GetContractUrlAsync(string contractIdHash, CancellationToken cancellationToken = default) =>
+        await Result.Try((Func<ValueTask<Result<string>>>)(async () =>
+        {
+            var cacheKey = HashService.ToMd5Hash($"getcontracturl-{contractIdHash}").Value;
+
+            var cached = await cache.GetStringAsync(cacheKey, cancellationToken);
+
+            if(string.IsNullOrWhiteSpace(cached))
+            {
+                var result = await service.GetContractUrlAsync(contractIdHash, cancellationToken);
+
+                if(result.IsFailed) return result;
+
+                await cache.SetStringAsync(cacheKey, result.Value, cancellationToken);
+
+                return result.Value;
+            }
+
+            return Result.Ok(cached!);
+        }));
+
+    public async ValueTask<Result> UpdateContractAsync(UpdateContractRequest request, CancellationToken cancellationToken = default) =>
+        await service.UpdateContractAsync(request, cancellationToken);
+
+    public async ValueTask<Result> UploadContractAsync(string contractIdHash, Guid userId, IFormFile file, CancellationToken cancellationToken = default) =>
+        await service.UploadContractAsync(contractIdHash, userId, file, cancellationToken);
 }