feat: Make node_id in ClientConnected optional #581

Job	Run time
Android Build Only (aarch64-linux-android)	1m 11s
Android Build Only (armv7-linux-androideabi)	1m 14s
Cross Build Only (x86_64-unknown-freebsd)	50s
check_semver	1m 43s
Cross Test (i686-unknown-linux-gnu)	5m 13s
Minimal Supported Rust Version	1m 17s
Checking docs	1m 9s
clippy_check	1m 15s
cargo deny	26s
codespell	8s
Checking fmt	23s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	2m 7s
CI Test Suite / Tests (ubuntu-latest, stable, none)	1m 10s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1m 44s
CI Test Suite / Tests (ubuntu-latest, stable, all)	1m 45s
CI Test Suite / Tests (ubuntu-latest, stable, default)	1m 57s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	1m 7s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	2m 9s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	1m 44s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	1m 42s
	30m 14s

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