Reorganize /docs with numbered TOC; deployment rewrite for actual homelab

- /docs/ now contains 12 numbered guides + index.md (navigator).
- Old duplicates removed: nexa-core/doc/, DEPLOYMENT.md, PLAN.md,
  config/{classification_logic,workflows_spec}.md.
- 09-deployment.md targets the running infra (LXC 104 docker host,
  Zoraxy at 192.168.1.4, existing Memos/n8n/LiteLLM/Nextcloud/Qdrant)
  rather than spinning a parallel stack; minimal-config approach.
- 11-open-questions.md tracks user-info-required blockers.
- 12-optimization-opportunities.md captures homelab tweaks.
- CLAUDE.md added so future agent runs know repo conventions and infra.

nexa-core/README.md

@@ -1,15 +1,17 @@
-# NEXA 🧠
-**The Neural Nexus for Information & Automation**
+# nexa-core
 
-Nexa ist das zentrale Nervensystem meines IT-Setups.
+Runtime artifacts for Nexa: n8n workflows, configuration, AI prompts, scripts.
 
-## 🏗 Architektur
-- **Interface:** Memos
-- **Logic:** n8n
-- **Memory:** Qdrant & Obsidian
-- **Intelligence:** SAIA (via LiteLLM)
+📖 Documentation lives one level up in [`../docs/`](../docs/index.md).
 
-## 📁 Struktur
-- `n8n-workflows/`: JSON-Exporte der Gehirn-Logik.
-- `ai-prompts/`: System-Prompts für Nexa.
-- `config/`: Schemata für Qdrant und API-Mappings.
+## Layout
+
+- `n8n-workflows/` — exported workflows (per phase). Imported into the running n8n.
+- `ai-prompts/` — system prompts for SAIA / LiteLLM.
+- `config/` — runtime config (`agents.yaml`, `infra_manifest.yaml`, `qdrant_schema.json`).
+- `scripts/` — automation helpers (workflow backup, etc.).
+- `.env.example` — bootstrap secrets only; runtime config lives in Qdrant `_config` namespace.
+
+## Quickstart
+
+See [`../docs/09-deployment.md`](../docs/09-deployment.md).