fix: #[doc(hidden)] plumbing module

[Veykril]

No description provided.

[netlify]

✅ Deploy Preview for salsa-rs canceled.

Name	Link
🔨 Latest commit	f9b3a1b
🔍 Latest deploy log	https://app.netlify.com/sites/salsa-rs/deploys/67ee66d9887cc80008215a5f

[codspeed-hq]

CodSpeed Performance Report

Merging #781 will degrade performances by 8.35%

_{Comparing Veykril:veykril/push-uqomyykvlvol (f9b3a1b) with master (9b51992)}

Summary

❌ 4 (👁 4) regressions
✅ 8 untouched benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
👁	amortized[Input]	3.5 µs	3.6 µs	-4.32%
👁	amortized[InternedInput]	3.3 µs	3.6 µs	-8.35%
👁	amortized[SupertypeInput]	4 µs	4.3 µs	-5.95%
👁	new[InternedInput]	5.6 µs	6 µs	-6.01%

[Veykril]

I am going to acknowledge these regressions, 1.86 just released and a lot of inlining of functions has changed, so this is just noies from compiler changes.