feat: Define a path migration event #7082

Job	Run time
Determine toolchains	7s
cargo clippy (macos-15, stable)	2m 36s
cargo clippy (ubuntu-24.04, nightly)	1m 48s
cargo clippy (macos-15, nightly)	1m 49s
cargo clippy (macos-15, 1.90.0)	1m 49s
cargo clippy (ubuntu-24.04, stable)	1m 34s
cargo clippy (ubuntu-24.04, 1.90.0)	54s
cargo clippy (windows-2025, 1.90.0)	5m 28s
cargo clippy (windows-2025, nightly)	5m 59s
cargo clippy (windows-2025, stable)	5m 46s
	27m 50s

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