docs(interner): add missing docs

[beeb]

No description provided.

[codspeed-hq]

Merging this PR will not alter performance

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

✅ 19 untouched benchmarks

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_{Comparing add-missing-docs (75f2239) with main (70c6f5c)}