jabberwocky238
d7e4fc73b1
phase2: COW append-only backend (segment diff + in-memory VFS)
- store: data.raw append-only / read-by-offset / fsync
- meta: Segment/VersionDiff/FileView/FileMeta + segment-list update (append/overwrite/truncate/extend) + in-memory directory tree
- fuse_ops: all callbacks route through COW backend; per-write Segment logging (op/phys_off/log_off/size)
- tests/phase2.sh: 5 write scenarios + sqlite + dir ops, 24/24 pass
Metadata in-memory (restart-lost; persistence phase 5); data.raw retains superseded bytes pending GC. cur cache / aggregation / multi-block land in phase 3.
Co-Authored-By: Claude <noreply@anthropic.com>