Reversed 0001 §5's 'durability is the DAG': minting chat into synced, content-addressed forum artifacts writes casual chatter permanently into the DAG, the opposite of Fossil's deliberate chat ephemerality (server-local, auto-purged, never synced). Chat stays live + the 7-day JetStream window; durable archival becomes a future quarry-specific/S3 concern, not near-term. Removes internal/chatarchive, its wiring and flags, events.KV, and the zitcli forum/technote wrappers it used (they return with v2 web-authored forum). Chat itself is unchanged. check-in: 3d68e9b401 user: dmestas tags: trunk