## What changed
- Recognize percent-encoded drive colons when inferring Windows paths, rendering
native path strings, and resolving same-drive relative joins.
- Reject Windows file URIs with percent-encoded `/` or `\` separators before
converting them to native absolute paths, so decoding cannot reinterpret URI
segment boundaries.
## Testing
- Cover uppercase and lowercase encodings for drive colons and path separators,
including local-drive and UNC file URIs.
GitOrigin-RevId: ecb6c92f4ef1af73f85e57a135abf6bc5bb968dc