docs: add ADR-0038/0039 and replace llm-workflows references with decomposed repos

- ADR-0038: Infrastructure metrics collection (smartctl, SNMP, blackbox, unpoller)
- ADR-0039: Alerting and notification pipeline (Alertmanager → ntfy → Discord)
- Replace llm-workflows GitHub links with Gitea daviestechlabs org repos
- Update AGENT-ONBOARDING.md: remove llm-workflows from file tree, add missing repos
- Update ADR-0006: fix multi-repo reference
- Update ADR-0009: fix broken llm-workflows link
- Update ADR-0024: mark ray-serve repo as created, update historical context
- Update README: fix ADR-0016 status, add 0038/0039 to table, update badges

AGENT-ONBOARDING.md

@@ -26,10 +26,15 @@ You are working on a **homelab Kubernetes cluster** running:
 | `chat-handler` | Text chat with RAG pipeline |
 | `voice-assistant` | Voice pipeline (STT → RAG → LLM → TTS) |
 | `kuberay-images` | GPU-specific Ray worker Docker images |
+| `pipeline-bridge` | Bridge between pipelines and services |
+| `stt-module` | Speech-to-text service |
+| `tts-module` | Text-to-speech service |
+| `ray-serve` | Ray Serve inference services |
 | `argo` | Argo Workflows (training, batch inference) |
 | `kubeflow` | Kubeflow Pipeline definitions |
 | `mlflow` | MLflow integration utilities |
 | `gradio-ui` | Gradio demo apps (embeddings, STT, TTS) |
+| `ntfy-discord` | ntfy → Discord notification bridge |
 
 ## 🏗️ System Architecture (30-Second Version)
 
@@ -73,8 +78,7 @@ kubernetes/apps/
 │   ├── kubeflow/             #   Pipelines, Training Operator
 │   ├── milvus/               #   Vector database
 │   ├── nats/                 #   Message bus
-│   ├── vllm/                 #   LLM inference
-│   └── llm-workflows/        #   GitRepo sync to llm-workflows
+│   └── vllm/                 #   LLM inference
 ├── analytics/                # 📊 Spark, Flink, ClickHouse
 ├── observability/            # 📈 Grafana, Alloy, OpenTelemetry
 └── security/                 # 🔒 Vault, Authentik, Falco