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/shared/skills/delegate/SKILL.md

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+# Delegate Task to Another Agent
+
+Sends a task to another Atomizer agent via the OpenClaw Hooks API. The target agent processes the task in an isolated session and optionally delivers the response to Discord.
+
+## When to Use
+
+- You need another agent to perform a task (research, analysis, NX work, etc.)
+- You want to assign work and get a response in a Discord channel
+- Cross-agent orchestration
+
+## Usage
+
+```bash
+bash /home/papa/atomizer/workspaces/shared/skills/delegate/delegate.sh <agent> "<instruction>" [options]
+```
+
+### Agents
+
+| Agent | Specialty |
+|-------|-----------|
+| `manager` | Orchestration, project oversight |
+| `tech-lead` | Technical decisions, FEA review |
+| `secretary` | Meeting notes, admin, status updates |
+| `auditor` | Quality checks, compliance review |
+| `optimizer` | Optimization setup, parameter studies |
+| `study-builder` | Study configuration, DOE |
+| `nx-expert` | NX/Simcenter operations |
+| `webster` | Web research, literature search |
+
+### Options
+
+- `--channel <discord-channel-id>` — Route response to a specific Discord channel
+- `--deliver` / `--no-deliver` — Whether to post response to Discord (default: deliver)
+
+### Examples
+
+```bash
+# Ask Webster to research something
+bash /home/papa/atomizer/workspaces/shared/skills/delegate/delegate.sh webster "Find the CTE of Zerodur Class 0 between 20-40°C"
+
+# Assign NX work with channel routing
+bash /home/papa/atomizer/workspaces/shared/skills/delegate/delegate.sh nx-expert "Create mesh convergence study for M2 mirror" --channel C0AEJV13TEU
+
+# Ask auditor to review without posting to Discord
+bash /home/papa/atomizer/workspaces/shared/skills/delegate/delegate.sh auditor "Review the thermal analysis assumptions" --no-deliver
+```
+
+## How It Works
+
+1. Looks up the target agent's port from the cluster port map
+2. Checks if the target agent is running
+3. Sends a `POST /hooks/agent` request to the target's OpenClaw instance
+4. Target agent processes the task in an isolated session
+5. Response is delivered to Discord if `--deliver` is set
+
+## Response
+
+The script outputs:
+- ✅ confirmation with run ID on success
+- ❌ error message with HTTP code on failure
+
+The delegated task runs **asynchronously** — you won't get the result inline. The target agent will respond in Discord.
+
+## Notes
+
+- Tasks are fire-and-forget. Monitor the Discord channel for the response.
+- The target agent sees the message as a hook trigger, not a Discord message.
+- For complex multi-step workflows, delegate one step at a time.