feat: inherit process mapping on forks

[GuillaumeLagrange]

Fixes unknown symbols observed when using processmap heavily

[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.

✅ 7 untouched benchmarks

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_{Comparing cod-2651-perf-fork-inherited-module-mappings-missing-for-child-pids (9afaef7) with main (ae00939)}