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.

docs/01-vision-and-scope.md

@@ -0,0 +1,34 @@
+# 01 — Vision & Scope
+
+## Vision
+
+Nexa is the **central nervous system** of a personal IT setup: an intelligent middleware sitting between input sources (Memos, e-mail, RSS, Karakeep, Bluesky), knowledge stores (Obsidian, Qdrant, Nextcloud) and organization tools (Nextcloud Calendar/Tasks).
+
+### Core goals
+
+- **Cognitive offload** — Nexa sorts, filters and proposes; it doesn't just store.
+- **Context separation** — clean AI-driven split between *Work* and *Personal*.
+- **Single point of interaction** — Memos is the primary surface ("voice & ear").
+- **Knowledge synergy** — link ephemeral memos to deep notes via semantic search.
+
+## Scope
+
+### In-scope
+
+- Triaging ~20 personal e-mails per day.
+- Routing tasks to the right Nextcloud list (Work vs. Personal).
+- Suggesting time-boxes in the work calendar.
+- Long-term memory in Qdrant (and optionally a graph DB).
+- Aggregating critical IT alerts (Proxmox, Backrest) into a Memos system feed.
+
+### Out-of-scope
+
+- Direct access to work IT (work mail, work servers).
+- Active document editing (metadata extraction only).
+- Replacing specialist UIs (Arcane / Dozzle / Portainer for containers).
+
+## Success metrics
+
+- **Reduced mail interaction** — less time in the mail app, more on the Nexa digest.
+- **Calendar fill-rate** — focus slots auto-blocked on the work calendar.
+- **Search latency** — old memos / Obsidian notes resurface instantly via `#nexa:ask`.