fix(gateway): harden Telegram polling conflict handling

- detect Telegram getUpdates conflicts and stop polling cleanly instead of retry-spamming forever
- add a machine-local token-scoped lock so different HERMES_HOME profiles on the same host can't poll the same bot token at once
- persist gateway runtime health/fatal adapter state and surface it in ● hermes-gateway.service - Hermes Agent Gateway - Messaging Platform Integration
     Loaded: loaded (/home/teknium/.config/systemd/user/hermes-gateway.service; enabled; preset: enabled)
     Active: active (running) since Sat 2026-03-14 09:25:35 PDT; 2h 45min ago
 Invocation: 8879379b25994201b98381f4bd80c2af
   Main PID: 1147926 (python)
      Tasks: 16 (limit: 76757)
     Memory: 151.4M (peak: 168.1M)
        CPU: 47.883s
     CGroup: /user.slice/user-1000.slice/user@1000.service/app.slice/hermes-gateway.service
             ├─1147926 /home/teknium/.hermes/hermes-agent/venv/bin/python -m hermes_cli.main gateway run --replace
             └─1147966 node /home/teknium/.hermes/hermes-agent/scripts/whatsapp-bridge/bridge.js --port 3000 --session /home/teknium/.hermes/whatsapp/session --mode self-chat

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⚠ Installed gateway service definition is outdated
  Run: hermes gateway restart  # auto-refreshes the unit

✓ Gateway service is running
✓ Systemd linger is enabled (service survives logout)
- cleanly exit non-retryable startup conflicts without triggering service restart loops

Tests:
- gateway status runtime-state helpers
- Telegram token-lock and polling-conflict behavior
- GatewayRunner clean exit on non-retryable startup conflict
- CLI runtime health summary

hermes_cli/gateway.py

@@ -367,6 +367,13 @@ def systemd_status(deep: bool = False):
         print("✗ Gateway service is stopped")
         print("  Run: hermes gateway start")
 
+    runtime_lines = _runtime_health_lines()
+    if runtime_lines:
+        print()
+        print("Recent gateway health:")
+        for line in runtime_lines:
+            print(f"  {line}")
+
     if deep:
         print_systemd_linger_guidance()
     else:
@@ -693,6 +700,35 @@ def _platform_status(platform: dict) -> str:
     return "not configured"
 
 
+def _runtime_health_lines() -> list[str]:
+    """Summarize the latest persisted gateway runtime health state."""
+    try:
+        from gateway.status import read_runtime_status
+    except Exception:
+        return []
+
+    state = read_runtime_status()
+    if not state:
+        return []
+
+    lines: list[str] = []
+    gateway_state = state.get("gateway_state")
+    exit_reason = state.get("exit_reason")
+    platforms = state.get("platforms", {}) or {}
+
+    for platform, pdata in platforms.items():
+        if pdata.get("state") == "fatal":
+            message = pdata.get("error_message") or "unknown error"
+            lines.append(f"⚠ {platform}: {message}")
+
+    if gateway_state == "startup_failed" and exit_reason:
+        lines.append(f"⚠ Last startup issue: {exit_reason}")
+    elif gateway_state == "stopped" and exit_reason:
+        lines.append(f"⚠ Last shutdown reason: {exit_reason}")
+
+    return lines
+
+
 def _setup_standard_platform(platform: dict):
     """Interactive setup for Telegram, Discord, or Slack."""
     emoji = platform["emoji"]
@@ -1186,11 +1222,23 @@ def gateway_command(args):
             if pids:
                 print(f"✓ Gateway is running (PID: {', '.join(map(str, pids))})")
                 print("  (Running manually, not as a system service)")
+                runtime_lines = _runtime_health_lines()
+                if runtime_lines:
+                    print()
+                    print("Recent gateway health:")
+                    for line in runtime_lines:
+                        print(f"  {line}")
                 print()
                 print("To install as a service:")
                 print("  hermes gateway install")
             else:
                 print("✗ Gateway is not running")
+                runtime_lines = _runtime_health_lines()
+                if runtime_lines:
+                    print()
+                    print("Recent gateway health:")
+                    for line in runtime_lines:
+                        print(f"  {line}")
                 print()
                 print("To start:")
                 print("  hermes gateway          # Run in foreground")