docs: add persistent cache invalidation notes #17955

Job	Run time
Check Source Changed	7s
Run benchmark	0s
Check license of dependencies	8s
Pnpm Lockfile Check	32s
Spell check	6s
Run Ecosystem CI	0s
Get Runner Labels / Get Runner Labels	1s
Test Release Windows	0s
Test Release Linux	0s
Test Release Mac	0s
Lint and format website	51s
Lint and format code	0s
Rust Changes	0s
Test Mac	0s
Test Linux / Build	2s
Test Windows / Build	3s
Rust check	0s
Rust test miri	0s
Check Rust Unused Dependencies	0s
Rust test	0s
Test Linux / Test Node 18	1s
Test Linux / E2E Testing	0s
Test Linux / Bench	0s
Test Windows / Test Node 18	1s
Test Windows / E2E Testing	0s
Test Windows / Bench	0s
Failure Notification	0s
	1m 52s

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