Push API changes

* Fix item repair cost formula
* Add "RequestUpdateAvailableFreeLoadout" function (WIP)
* Fix item sell formula
* Fix item stack split on sell
* Fix contract progression counting for objectives other than owned items
* Refactor balance into a proper struct
* Separate and update Season 2 and Season 3 data

src/Prospect.Server.Api/Services/CloudScript/Functions/RequestUpdateAvailableFreeLoadout.cs

@@ -0,0 +1,47 @@
+using System.Text.Json.Serialization;
+using Prospect.Server.Api.Services.Auth.Extensions;
+using Prospect.Server.Api.Services.CloudScript;
+
+public class RequestUpdateAvailableFreeLoadoutRequest
+{
+}
+
+public class RequestUpdateAvailableFreeLoadoutResponse
+{
+    [JsonPropertyName("userId")]
+	public string UserId { get; set; }
+    [JsonPropertyName("error")]
+	public string Error { get; set; }
+    [JsonPropertyName("newRandomSeed")]
+	public int NewRandomSeed { get; set; }
+}
+
+[CloudScriptFunction("RequestUpdateAvailableFreeLoadout")]
+public class RequestUpdateAvailableFreeLoadoutFunction : ICloudScriptFunction<RequestUpdateAvailableFreeLoadoutRequest, RequestUpdateAvailableFreeLoadoutResponse>
+{
+    private readonly IHttpContextAccessor _httpContextAccessor;
+    private readonly ILogger<RequestUpdateAvailableFreeLoadoutFunction> _logger;
+
+    public RequestUpdateAvailableFreeLoadoutFunction(ILogger<RequestUpdateAvailableFreeLoadoutFunction> logger, IHttpContextAccessor httpContextAccessor)
+    {
+        _logger = logger;
+        _httpContextAccessor = httpContextAccessor;
+    }
+
+    public async Task<RequestUpdateAvailableFreeLoadoutResponse> ExecuteAsync(RequestUpdateAvailableFreeLoadoutRequest request)
+    {
+        var context = _httpContextAccessor.HttpContext;
+        if (context == null)
+        {
+            throw new CloudScriptException("CloudScript was not called within a http request");
+        }
+        var userId = context.User.FindAuthUserId();
+
+        return new RequestUpdateAvailableFreeLoadoutResponse
+        {
+            UserId = userId,
+            Error = "",
+            NewRandomSeed = 0,
+        };
+    }
+}