feat: add Atomizer HQ multi-agent cluster infrastructure

- 8-agent OpenClaw cluster (Manager, Tech-Lead, Secretary, Auditor,
  Optimizer, Study-Builder, NX-Expert, Webster)
- Orchestration engine: orchestrate.py (sync delegation + handoffs)
- Workflow engine: YAML-defined multi-step pipelines
- Agent workspaces: SOUL.md, AGENTS.md, MEMORY.md per agent
- Shared skills: delegate, orchestrate, atomizer-protocols
- Capability registry (AGENTS_REGISTRY.json)
- Cluster management: cluster.sh, systemd template
- All secrets replaced with env var references

hq/workspaces/nx-expert/TOOLS.md

@@ -0,0 +1,18 @@
+# TOOLS.md — NX Expert
+
+## Primary Tool: NXOpen MCP Documentation Server
+- **Path:** `/home/papa/atomizer/tools/nxopen-mcp/`
+- **Venv:** `.venv/` (activate before use)
+- **Data:** `./data/` — 15,509 classes, 66,781 methods, 426 functions
+- **Sources:** NXOpen API stubs (NX 2512), nxopentse helpers, pyNastran BDF/OP2
+
+## Shared Resources
+- **Atomizer repo:** `/home/papa/repos/Atomizer/` (read-only)
+- **Obsidian vault:** `/home/papa/obsidian-vault/` (read-only)
+
+## Skills
+- `atomizer-protocols` — Company protocols (load every session)
+
+## Agent Communication
+- `sessions_send` — Direct message to another agent
+- Slack @mentions — Primary communication in project channels