fix(ci): drop --entrypoint override in hermes-smoke-test action

PR #30136 review caught a silent regression: the smoke-test action
overrode ENTRYPOINT to `/opt/hermes/docker/entrypoint.sh`, which the
s6-overlay migration reduced to a shim that just `exec`s the stage2
hook. stage2-hook ignores its CMD args, prints "Setup complete", and
exits 0 — so `hermes --help` and `hermes dashboard --help` never
ran. The #9153 regression guard was a green-always no-op.

Drop the override so the smoke test uses the image's real ENTRYPOINT
chain (`/init` + `main-wrapper.sh`), which is the actual production
startup path. `hermes --help` and `hermes dashboard --help` now run
through the full supervision tree and exercise the real argv routing.

.github/actions/hermes-smoke-test/action.yml

@@ -29,9 +29,13 @@ runs:
     - name: hermes --help
       shell: bash
       run: |
+        # Use the image's real ENTRYPOINT (/init + main-wrapper.sh) so
+        # this exercises the actual production startup path. PR #30136
+        # review caught that an --entrypoint override here had been
+        # silently neutered by the s6-overlay migration — stage2-hook
+        # ignores its CMD args, so the smoke test was a no-op.
         docker run --rm \
           -v /tmp/hermes-test:/opt/data \
-          --entrypoint /opt/hermes/docker/entrypoint.sh \
           "${{ inputs.image }}" --help
 
     - name: hermes dashboard --help
@@ -43,5 +47,4 @@ runs:
         # installed package.
         docker run --rm \
           -v /tmp/hermes-test:/opt/data \
-          --entrypoint /opt/hermes/docker/entrypoint.sh \
           "${{ inputs.image }}" dashboard --help