feat(gateway): real FreeBSD rc.d detection in get_gateway_runtime_snapshot

`hermes status` reported the gateway as "manual process" on FreeBSD because
get_gateway_runtime_snapshot() only had systemd/launchd branches and fell
through. Add a proper FreeBSD rc.d path so status reports real state:

- is_freebsd() helper (sys.platform.startswith("freebsd")).
- _freebsd_rcd_service_path() + _probe_freebsd_service_running() — probes the
  hermes_daemon rc.d service via `service hermes_daemon onestatus` (reports
  running regardless of the rcvar enable flag; works without root; fail-safe on
  timeout/missing binary), mirroring the launchd probe.
- snapshot branch: manager="rc.d (hermes_daemon)", service_installed (rc.d file
  present), service_running (onestatus), service_scope="rc.d".

This is the deeper fix behind the status.py fallback message (PR #6). Not changed:
get_managed_gateway_pids() restart-drain path (systemd/launchd only) — gateway
liveness already works via find_gateway_pids(); rc.d restart-drain is a separate
follow-up.

py_compile clean; wiring + branch-ordering verified.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

hermes_cli/gateway.py

@@ -1079,6 +1079,30 @@ def _probe_launchd_service_running() -> bool:
     return result.returncode == 0
 
 
+_FREEBSD_RCD_SERVICE = "hermes_daemon"
+
+
+def _freebsd_rcd_service_path() -> Path:
+    return Path("/usr/local/etc/rc.d") / _FREEBSD_RCD_SERVICE
+
+
+def _probe_freebsd_service_running() -> bool:
+    if not _freebsd_rcd_service_path().exists():
+        return False
+    try:
+        # `onestatus` reports running state regardless of the rcvar enable flag,
+        # and works without root.
+        result = subprocess.run(
+            ["service", _FREEBSD_RCD_SERVICE, "onestatus"],
+            capture_output=True,
+            text=True,
+            timeout=10,
+        )
+    except (subprocess.TimeoutExpired, FileNotFoundError, OSError):
+        return False
+    return result.returncode == 0
+
+
 def get_gateway_runtime_snapshot(system: bool = False) -> GatewayRuntimeSnapshot:
     """Return a unified view of gateway liveness for the current profile."""
     gateway_pids = tuple(find_gateway_pids())
@@ -1128,6 +1152,15 @@ def get_gateway_runtime_snapshot(system: bool = False) -> GatewayRuntimeSnapshot
             service_scope="launchd",
         )
 
+    if is_freebsd():
+        return GatewayRuntimeSnapshot(
+            manager=f"rc.d ({_FREEBSD_RCD_SERVICE})",
+            service_installed=_freebsd_rcd_service_path().exists(),
+            service_running=_probe_freebsd_service_running(),
+            gateway_pids=gateway_pids,
+            service_scope="rc.d",
+        )
+
     return GatewayRuntimeSnapshot(
         manager="manual process",
         gateway_pids=gateway_pids,
@@ -1369,6 +1402,10 @@ def is_macos() -> bool:
     return sys.platform == "darwin"
 
 
+def is_freebsd() -> bool:
+    return sys.platform.startswith("freebsd")
+
+
 def is_windows() -> bool:
     return sys.platform == "win32"