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>

.gitignore

@@ -93,6 +93,12 @@ npm-debug.log*        # npm debug logs
 yarn-debug.log*       # Yarn debug logs
 yarn-error.log*       # Yarn error logs
 
+# Claude Code Configuration Files
+# -------------------------------
+.claude.json              # Claude MCP server configuration (contains API keys)
+*.claude.json            # Any Claude config files
+.claude/                 # Claude configuration directory
+
 # Custom Exclusions
 # ----------------
 # Add any custom patterns specific to your homelab below: