[core] Refactor `ecal_path_processing.cpp` to C++17 `std::filesystem`#2608

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Peguen merged 7 commits intomasterfrom

feature/path_processing_to_cpp17

May 5, 2026

Commits on Apr 8, 2026

Path processing to cpp17.
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Commits on Apr 9, 2026

Added missing header.
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Commits on Apr 10, 2026

Some improvements for style.
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Commits on Apr 27, 2026

Commits on Apr 28, 2026

getTempDir fix.
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Cleanups.
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