fix: normalize full-path matches for parent search paths

[lawrence3699]

Summary

Normalize --full-path matching for relative search paths containing . or ...

Fixes #1513.

Before

From a nested directory, a full-path match against a parent search path could fail unless --absolute-path was also set. For example, from one/two:

fd --full-path -t f '<abs>/one/b.foo' ..

returned no results, while the same logical query started matching when --absolute-path was added.

After

--full-path matching normalizes relative search paths with . or .. before matching, so the result set no longer depends on --absolute-path.

Why this is correct

The matching path was being built as <cwd>/../... and compared without normalization. This change only normalizes paths for matching when the relative entry path actually contains . or .., and falls back to the existing behavior if normalization fails.

Testing

• cargo test test_full_path_normalizes_relative_search_path -- --nocapture
• cargo test test_normalized_absolute_path -- --nocapture
• cargo test test_full_path -- --nocapture
• cargo test test_symlink_and_full_path -- --nocapture
• cargo test search_str_for_entry_with_relative_path -- --nocapture

[Copilot]

Pull request overview

This PR fixes a bug in fd’s --full-path matching where relative search paths containing ./.. could produce non-normalized absolute paths (e.g., <cwd>/../…) and therefore fail to match patterns unless --absolute-path was also used.

Changes:

• Normalize constructed match paths for --full-path when the traversed entry path contains . or .. components (fallback to prior behavior if normalization fails).
• Add a regression test covering --full-path matching when searching from a nested directory with .. as the search path.
• Document the bugfix in the changelog.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/walk.rs	Normalizes the absolute match path for --full-path when dot-components are present, fixing mismatches from parent-relative search roots.
tests/tests.rs	Adds an integration regression test reproducing the reported --full-path + .. mismatch and validating the corrected behavior.
CHANGELOG.md	Records the bugfix under Unreleased bugfixes and links to the reported issue.

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