chore: add 499 error for client closed connections

Author: ssepml

api-errors.json

@@ -643,6 +643,10 @@
         "short_message": "Unavailable For Legal Reasons",
         "long_message": "Unavailable For Legal Reasons"
     },
+    "49900": {
+        "short_message": "Client Closed Request",
+        "long_message": "Client closed the connection before the server answered the request"
+    },
     "50000": {
         "short_message": "Internal Server Error",
         "long_message": "The server encountered an unexpected condition which prevented it from fulfilling the request"

linter/lint.py

@@ -28,9 +28,9 @@ def __str__(self) -> str:
     406, 407, 408, 409, 410, 411,
     412, 413, 414, 415, 416, 417,
     418, 421, 422, 423, 424, 425,
-    426, 428, 429, 431, 451, 500,
-    501, 502, 503, 504, 505, 506,
-    507, 508, 510, 511
+    426, 428, 429, 431, 451, 499,
+    500, 501, 502, 503, 504, 505,
+    506, 507, 508, 510, 511
 ]