fix: re-calculate CachedPathImpl::parent and CachedPathImpl::node_modules if the cache is dropped

[sapphi-red]

This PR is similar to #791 but for CachedPathImpl::parent and CachedPathImpl::node_modules.

This PR aims to fix the flaky failure like https://github.com/vitejs/rolldown-vite/actions/runs/19126439595/job/54657469579#step:11:216

[sapphi-red]

• fix: re-calculate CachedPathImpl::parent and CachedPathImpl::node_modules if the cache is dropped #817 👈 (View in Graphite)
• main

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[codecov]

Codecov Report

❌ Patch coverage is 86.66667% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.12%. Comparing base (6b1c9ed) to head (edc530a).

Files with missing lines	Patch %	Lines
src/cache/cached_path.rs	83.33%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #817      +/-   ##
==========================================
- Coverage   94.26%   94.12%   -0.15%     
==========================================
  Files          17       17              
  Lines        3071     3098      +27     
==========================================
+ Hits         2895     2916      +21     
- Misses        176      182       +6     

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[codspeed-hq]

CodSpeed Performance Report

Merging #817 will not alter performance

_{Comparing 11-07-fix_re-calculate_cachedpathimpl_parent_and_cachedpathimpl_node_modules_if_the_cache_is_dropped (edc530a) with main (6b1c9ed)}

Summary

✅ 10 untouched
⏩ 5 skipped¹

Footnotes

1. 5 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[Boshen]

I need to rethink the architecture.