DCAB 0.9.0

Added\n\n- review.permission_range_editor_changed: a deterministic pair that retains one paired editable-range marker boundary and its covered stored text while changing only a synthetic individual editor assignment.\n- Target-free truth for the stored permission-markup fact, with no effective-authorization or client-behavior claim.\n- DocFence adapter mapping for the privacy-preserving permission-range inventory.\n\n## Contract\n\nThe fixture and observation schemas remain at version 1. The corpus has 20 paired cases. Every pair retains its package-member set and stored Word text-node sequence; the new pair changes only word/document.xml.\n\n## Verification\n\nCI passed on Python 3.11, 3.12, and 3.13 plus the clean DocFence adapter.