[#189] status: add Object section and ACL_DENIED code

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

status/types.proto

@@ -64,6 +64,9 @@ enum Section {
 
     // Failure codes regardless of the operation.
     SECTION_FAILURE_COMMON = 1;
+
+    // Object service-specific errors.
+    SECTION_OBJECT = 2;
 }
 
 // Section of NeoFS successful return codes.
@@ -87,3 +90,11 @@ enum CommonFail {
     //  unsigned integer).
     WRONG_MAGIC_NUMBER = 1;
 }
+
+// Section of statuses for object-related operations.
+enum Object {
+    // [**2048**] Access denied by ACL.
+    // Details:
+    // - [**0**] Human-readable description.
+    ACCESS_DENIED = 0;
+}