feat: wire up HERMES_PROFILES to multi-gateway launcher script

- Add run-multi-gateways.sh to /opt/data/hermes-tools/ that reads
  HERMES_PROFILES env var and spawns one gateway per profile
- Update entrypoint to call the script before the main entrypoint
- Set HERMES_PROFILES=ashley,claire,finn,matt,paul (was default)

Closes PR #47 (feat/multi-profile-gateways). Builds on 548e15d's cleaner
env-var-driven approach — compose.yml stays declarative, logic in script.

ai/compose.yml

@@ -32,7 +32,7 @@ services:
         - default
     container_name: hermes
     entrypoint: ["/bin/bash", "-c",
-      "bash /opt/data/hermes-tools/install.sh && exec /usr/bin/tini -g -- /opt/hermes/docker/entrypoint.sh \"$@\"",
+      "bash /opt/data/hermes-tools/install.sh && bash /opt/data/hermes-tools/run-multi-gateways.sh && exec /usr/bin/tini -g -- /opt/hermes/docker/entrypoint.sh \"$@\"",
       "hermes-entrypoint"]
     restart: always
     # Gateway run enables the internal API server on port 8642
@@ -43,7 +43,7 @@ services:
       # Multi-profile: comma-separated list of profiles to run as gateways.
       # The entrypoint reads this and starts one gateway per profile.
       # Add profiles here when they exist on disk (e.g. default,researcher,writer)
-      - HERMES_PROFILES=default
+      - HERMES_PROFILES=ashley,claire,finn,matt,paul
       - API_SERVER_ENABLED=true
       - API_SERVER_PORT=8642
       - API_SERVER_HOST=0.0.0.0