omigamedev
f1b59a2d1a
Add lastAccessedAt timestamp to nodes with schema migration and backfill. Touch timestamp on read, apply exponential freshness decay (~69-day half-life) to search scoring alongside BM25 and vector weights. Add auto-decay that marks untouched nodes as stale after a configurable threshold, with CLI command and server-side daily interval. Include comprehensive USAGE.md documenting all CLI commands and REST API.