Release 0.5.35

[0.5.35] - 2026-04-11

Backup/restore, CDC error handling, and engine 0.5.35 alignment (non-exhaustive enums, private QueryResult rows, new feature flags).

Added

• Backup/restore endpoints: hot snapshots via MVCC, no write downtime (#53 by @Michaelzag)
  • POST /admin/{db}/backup: create a .grafeo snapshot
  • GET /admin/{db}/backups: list backups for a database
  • GET /backups: list all backups across databases
  • POST /admin/{db}/restore: restore from a backup file (automatic safety backup before restore)
  • DELETE /backups/{filename}: delete a backup file
  • GET /backups/download/{filename}: download a backup file
• CLI flags: --backup-dir (backup storage directory), --backup-retention (keep N most recent per database)
• ArcSwap database handle: DatabaseEntry.db changed from Arc<GrafeoDB> to ArcSwap<GrafeoDB> for lock-free hot-swapping during restore. Callers get 503 during restore instead of 404 (#53 by @Michaelzag)
• Sync pull CDC validation: POST /sync/{db}/pull now returns 400 with an explanatory message when CDC is not enabled on the database, instead of silently returning empty results (#55 by @Michaelzag)
• lpg feature flag: new explicit LPG data model feature, forwarded through grafeo-service to grafeo-engine/lpg. Included in default and full tiers
• triple-store feature flag: replaces rdf as the canonical name for RDF/triple store support. rdf kept as deprecated alias

Changed

• grafeo-engine 0.5.35: section-based container format, grafeo-storage crate extraction, incremental backup API (backup_full()/backup_incremental()/restore_to_epoch()), CDC retention and eviction, WAL replay fix, block-based LPG/RDF section formats, persona-based feature profiles
• QueryResult.rows now private: all access migrated to .rows(), .into_rows(), and QueryResult::from_rows() constructor
• #[non_exhaustive] on all engine enums: all match on Value, EntityId, ChangeKind, SchemaInfo now include wildcard arms
• Feature rename: rdf -> triple-store in grafeo-service and binary crate features. sparql feature now depends on triple-store directly
• full tier updated: includes lpg and uses triple-store instead of deprecated rdf alias

Fixed (via engine 0.5.35)

• WAL not replayed on reopen: data no longer lost across restarts without explicit checkpoint (grafeo#252)
• CDC event log unbounded memory: epoch-based and count-based retention with BufferManager eviction (grafeo#250)
• Graph/schema context validation: reject nonexistent targets, drop_graph() auto-clears active context (grafeo#245)

New Contributors

• @Michaelzag made their first contribution in #55

Full Changelog: v0.5.34...v0.5.35