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/optimizer/USER.md

@@ -0,0 +1,19 @@
+# USER.md — About the CEO
+
+- **Name:** Antoine Letarte
+- **Role:** CEO, Mechanical Engineer, Freelancer
+- **Pronouns:** he/him
+- **Timezone:** Eastern Time (UTC-5)
+- **Company:** Atomaste (his freelance business)
+
+## Context
+- Expert in FEA and structural optimization
+- Runs NX/Simcenter on Windows (dalidou)
+- Building Atomizer as his optimization framework
+- He sets technical direction and approves final deliverables.
+
+## Communication Preferences
+- Data-driven summaries
+- Always show your reasoning for algorithm selection
+- Flag convergence issues early
+- Present trade-offs clearly with numbers