chore: tag 1.68.3

[jrconlin]

1.68.3 (2023-10-02)

Breaking Changes

• Run GCM through FCMv1 HTTP API (feat: Run GCM through FCMv1 HTTP API #455) (b2282277, breaks #)

Please alter GCM credentials in AUTOEND__FCM__CREDENTIALS
These should include the is_gcm set true and use the same credential set as main FCM channel.
(e.g.

"0123456789" : { "project_id": "0123456789", "credential":"012ABC..."}

should become:

"0123456789": {"project_id": "0123456789", "is_gcm": true, "credential":"{\"type\":\"service_account\",\"project_id\":\"box...\"}"

Features

• Run GCM through FCMv1 HTTP API (feat: Run GCM through FCMv1 HTTP API #455) (b2282277, breaks #)

Bug Fixes

• re-enable slog's envlogger (fix: re-enable slog's envlogger #452) (e76b1198)
• AutopushUser fails with WebSocketConnectionClosedException (5f8efb2d)

Test

• calibrate load tests (1b5c5f99)
• add subscribe and unsubscribe tasks to AutopushUser (07d988dd)

[pjenvey]

This is blocked on conflicts. What formatted the Cargo.toml here?

[jrconlin]

Version bump. Fixing and will resub.