docs(CLAUDE): add secrets rule — pass-first, stostayer server map
Credentials live in pass (password-store); check `pass ls`/`pass show` before
grepping the wiki or ~/.ssh/config. Lists the СТО Стайер pass entries
(stostayer/client, rusonyx, client-wireguard).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
@
Pulls in `session handoff: read on start, write on end` so the
session-handoff skill (installed via claude-skills) activates in this
project. Inserted between `pull remote before work` and
`follow project discipline` — session-lifecycle clustering, mirrors
claude-skills CLAUDE.md and project-bootstrap's canonical template.
Refs OpeItcLoc03/claude-skills [session-handoff-existing-projects-upgrade].
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>