fix(moysklad): drop Accept-Encoding: gzip to avoid JSON parse failure

HttpClient in DI isn't configured with AutomaticDecompression, so MoySklad
returned a gzip-compressed body that ReadFromJsonAsync choked on (0x1F is
the gzip magic byte). Cheapest correct fix is to not advertise gzip.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/food-market.infrastructure/Integrations/MoySklad/MoySkladClient.cs

@@ -37,7 +37,8 @@ private HttpRequestMessage Build(HttpMethod method, string pathAndQuery, string
         // after ';'). The typed MediaTypeWithQualityHeaderValue API normalizes to
         // "application/json; charset=utf-8" which MoySklad rejects with code 1062.
         req.Headers.TryAddWithoutValidation("Accept", "application/json;charset=utf-8");
-        req.Headers.AcceptEncoding.Add(new StringWithQualityHeaderValue("gzip"));
+        // Don't advertise gzip — HttpClient here isn't configured with AutomaticDecompression,
+        // and the JSON deserializer would choke on the gzip magic byte (0x1F).
         return req;
     }