fix: process parallel events and potential deadlock in `on_record` #112

Job	Run time
cargo check	41s
warnings	33s
cargo fmt	4s
cargo check (feature combinations)	23s
cargo check (+MSRV -Zminimal-versions) (1.65.0)	3m 18s
cargo check (+MSRV -Zminimal-versions) (stable)	26s
cargo test (stable on ubuntu-latest)	59s
build tests (wasm)	1m 0s
cargo test (beta on ubuntu-latest)	1m 6s
cargo test (nightly on ubuntu-latest)	1m 4s
cargo test (stable on windows-latest)	3m 2s
cargo test (stable on macos-latest)	2m 21s
all systems go!	1s
	14m 58s

Provide feedback