Add OM1 Doctor diagnostic reference to troubleshooting guide

docs/developing/9_troubleshooting_guide.md

@@ -13,3 +13,28 @@ icon: wrench
 | Robot not moving        | Connection issue/Network issue            | Restart OM1/Robot and check your internet connection                                        |
 | OpenSSL certificate issue | Security certificate not found | `uv pip install certifi` `export SSL_CERT_FILE=$(python3 -m certifi)` `export REQUESTS_CA_BUNDLE=$(python3 -m certifi)` |
 | Error message during build: `fatal error: portaudio.h: No such file or directory compilation terminated. error: command '/usr/bin/gcc' failed with exit code 1` | The issue is due to python-all-dev being deprecated and unavailable in non standard Ubuntu installations. | Installing only PortAudio development headers fixes the problem: `sudo apt-get update` `sudo apt-get install portaudio19-dev`|
+
+---
+
+## Advanced Diagnostics (Community Tool)
+
+For more advanced troubleshooting and automated health checks, you can use the community-built **OM1 Doctor** CLI tool:
+
+https://github.com/CMZS4/om1-doctor
+
+It provides:
+
+- Disk & RAM diagnostic checks
+- Python & environment validation
+- Local port scan
+- Log signature detection
+- Markdown report generation
+
+Example usage:
+
+```bash
+om1-doctor doctor
+om1-doctor report --md-out report.md
+```
+
+The generated report can be attached to GitHub issues to help maintainers and users quickly resolve common node problems.