0.6.0

Added

• IPC Transport: Cross-process sync via Unix domain sockets
  • ipc_server — binds and listens on a channel socket
  • ipc_socket_client — implements sync_transport interface
  • Length-prefix framing over SOCK_STREAM
  • Channel-based naming: resolve_ipc_socket_path() maps channel names to platform paths
  • macOS: ~/Library/Caches/Lattice/ipc/<channel>.sock
  • Linux: $XDG_RUNTIME_DIR/lattice/<channel>.sock (fallback: /tmp/lattice-<uid>/)
• Per-Synchronizer Sync State: _lattice_sync_state table
  • Independent sync tracking per transport via sync_id
  • query_audit_log_for_sync() — returns pending entries for a specific synchronizer
  • Backwards compatible: single-synchronizer mode still uses isSynchronized column
• Cloud Relay Mode: sync_apply_mode::relay
  • IPC-received entries written with isFromRemote=1, isSynchronized=0
  • Receiving synchronizer's own sync_id marked as synced (loop prevention)
  • Other synchronizers (WSS, other IPC) see entries as pending
• Filtered Sync: Per-table upload filtering
  • sync_filter_entry with table name + SQL predicate
  • reconcile_sync_filter() — generates initial sync set from filter
  • Applied at upload time; downloads always accepted
• collect_all_sync_ids() — gathers WSS + IPC sync IDs for multi-transport
• IPC integration tests (C++ test suite)

Changed

• websocket_client interface renamed to sync_transport
• synchronizer now accepts sync_transport* instead of websocket_client*
• upload_pending_changes() uses _lattice_sync_state JOIN when sync_id is set

Fixed

• Linux resolve_ipc_socket_path test assertion for Docker environments without XDG_RUNTIME_DIR