fix: use argparse entrypoint in top-level launcher (#3874)

The ./hermes convenience script still used the legacy Fire-based
cli.main wrapper, which doesn't support subcommands (gateway, cron,
doctor, etc.). The installed 'hermes' command already uses
hermes_cli.main:main (argparse) — this aligns the launcher.

Salvaged from PR #2009 by gito369.

tests/hermes_cli/test_launcher.py

@@ -0,0 +1,42 @@
+"""Tests for the top-level `./hermes` launcher script."""
+
+import runpy
+import sys
+import types
+from pathlib import Path
+
+
+def test_launcher_delegates_to_argparse_entrypoint(monkeypatch):
+    """`./hermes` should use `hermes_cli.main`, not the legacy Fire wrapper."""
+    launcher_path = Path(__file__).resolve().parents[2] / "hermes"
+    called = []
+
+    fake_main_module = types.ModuleType("hermes_cli.main")
+
+    def fake_main():
+        called.append("hermes_cli.main")
+
+    fake_main_module.main = fake_main
+    monkeypatch.setitem(sys.modules, "hermes_cli.main", fake_main_module)
+
+    fake_cli_module = types.ModuleType("cli")
+
+    def legacy_cli_main(*args, **kwargs):
+        raise AssertionError("launcher should not import cli.main")
+
+    fake_cli_module.main = legacy_cli_main
+    monkeypatch.setitem(sys.modules, "cli", fake_cli_module)
+
+    fake_fire_module = types.ModuleType("fire")
+
+    def legacy_fire(*args, **kwargs):
+        raise AssertionError("launcher should not invoke fire.Fire")
+
+    fake_fire_module.Fire = legacy_fire
+    monkeypatch.setitem(sys.modules, "fire", fake_fire_module)
+
+    monkeypatch.setattr(sys, "argv", [str(launcher_path), "gateway", "status"])
+
+    runpy.run_path(str(launcher_path), run_name="__main__")
+
+    assert called == ["hermes_cli.main"]