docs(infrastructure): add MCP setup and n8n deployment documentation

- Add Obsidian MCP server setup guide for WSL2 integration (820 lines)
- Add comprehensive n8n workflow automation deployment plan (1,948 lines)
- Add agent workflow coordination via CLAUDE_STATUS.md
- Update CLAUDE.md with universal agent workflow protocol
- Remove deprecated homelab-steve agent definition
- Enhance .gitignore with Claude config exclusions

Security: API key sanitized, no production secrets exposed
Infrastructure Impact: None (documentation only)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

CLAUDE.md

@@ -64,6 +64,19 @@ The storage layout demonstrates a well-organized approach to data separation:
 
 ## Working with This Environment
 
+### Universal Workflow
+For every complex task, every Agent must follow this loop:
+1.  **Read**: `cat CLAUDE_STATUS.md` to see where we are.
+2.  **Execute**: Perform your specific task (Coding, Docs, Sysadmin).
+3.  **Update**: Edit `CLAUDE_STATUS.md` to mark your step as `[x]` and update the "Current Context".
+
+### Status File Template
+If `CLAUDE_STATUS.md` is missing, initialize it with:
+- **Goal**: [User Goal]
+- **Phase**: [Planning / Dev / Deploy]
+- **Checklist**: [List of steps]
+
+
 ### Best Practices
 
 1. **Backup Strategy**: With PBS-Backups at 21.6% utilization and excellent uptime (27-68 days), ensure regular backup schedules are maintained. Consider implementing the 3-2-1 rule if not already in place.