Move lexical scan-bound calculation into `codex_protocol::permissions` and
expose `windows_deny_read_glob_scan` with its `WindowsDenyReadGlobScan` result.
Have the Windows sandbox resolver use the shared helper, preserving literal
scan roots, glob suffixes, and traversal depth limits without filesystem access
in the planner.
GitOrigin-RevId: 748a12b45f89c6e045e9123c055453ec39c202b1
