Expand SVN status and path-safety test matrix

[lzl51230]

Scope

The initial SVN state suite for #1113 covers repeated edits, basic malformed XML, one ignored directory, a hostile current directory, and one real working copy. Add focused table-driven and real fixtures for the remaining high-risk state/parser branches.

Coverage

• Added/deleted/missing/replaced/moved/obstructed/ignored/unversioned and text/property/tree conflicts.
• Reordered entries, split/truncated input, oversized tokens, numeric entities, and unknown schema extensions.
• Mixed-revision, sparse, and file/directory external working copies.
• Absolute/drive/parent traversal, encoded separators, symlinks, Windows reparse points, Unicode, @, leading dashes, CRLF, and long paths.
• Scale characterization for large XML and candidate trees.

[DeusData]

Tracked as a 0.9.2-rc parser and path-safety task for #1113/#1127. The traversal, symlink/reparse-point, encoded-separator, truncation, and oversized-token cases are security boundaries, not optional breadth. The PR review will distinguish merge-blocking containment cases from broader post-merge compatibility characterization.