error_tracking: support user ids as integers as well as strings
Allows user id interface to accept integer IDs. Closes #2735 (closed)
Allowing integers in IDs at least affects the PHP client whereby a default zero value is always sent for the ID. Given this, the ID precedence is lowered.
Fixes flake where the generated time is not within tolerance in CI. Closes #2696 (closed)
Edited by Joe Shaw