Community review (devoruncommented) correctly identified that the Slack
adapter re-read SLACK_APP_TOKEN from os.getenv() during disconnect,
which could differ from the value used during connect if the environment
changed. Discord had the same pattern with self.config.token (less risky
but still not bulletproof).
Both now follow the Telegram pattern: store the token identity on self
at acquire time, use the stored value for release, clear after release.
Also fixes docs: alias naming was hermes-<name> in docs but actual
implementation creates <name> directly (e.g. ~/.local/bin/coder not
~/.local/bin/hermes-coder).
442888a05b