- Add /api/v1/health endpoint with component-level checks - Verify DB connectivity, fail2ban socket, scheduler, session cache - Add SQLite WAL cleanup on startup (orphan crash files) - Migration 8: import_log.timestamp → INTEGER UNIX epoch - Align import_log timestamps with history_archive (already UNIX int) - Add unit tests for DB cleanup and health router Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>