memsearch episodic memory (Step 4) is now live and synced via git. Record
the final sync design: dedicated private Forgejo repo at
forgejo.swansoncloud.com/jared/memsearch, auto-commit+push via cc-os
session-end hook, and the resolved decision to use a single global
cross-client store (not per-client repos). Commingling is an explicit
design choice, not a tolerated risk. Update build plan to split Step 5 into
5a (episodic sync, done) and 5b (vault sync, remaining). Update CLAUDE.md
implementation status, USER-GUIDE to reflect memsearch now operational, and
add full ADR-015 decision record with rationale and alternatives.