Fix IsPathRelativeAndInvolvesNoTraversal treating "." component as directory entry

The check `normalizedPath == "."` compared the entire input path against "."
instead of the current path component `part`. This caused any "." component
in the middle of a path to increment the depth counter rather than be a no-op,
allowing subsequent ".." components to escape the root undetected.

For example, "./.." was incorrectly accepted: "." bumped depth to 1, then ".."
decremented it back to 0, and the function returned true instead of false.

Added a regression test covering this case.
commit_hash:6d034e6e0a26f960ccdee3f7a362916369b0f4b9

0 files changed, 0 insertions, 0 deletions