chore: add deploy config with systemd services for auto-start on boot

- frappe-bench-web, worker, schedule, socketio, watch services
- frappe-bench.target to group all services
- bench-env.sh wrapper for proper PATH resolution
- deploy README with installation/management instructions

deploy/README.md

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+# Deployment Configuration
+
+## Systemd Services
+
+The Frappe Bench (ERPNext) is managed via systemd for automatic startup on boot.
+
+### Services
+
+| Service | Description | Port |
+|---------|-------------|------|
+| `frappe-bench-web.service` | Web server (gunicorn) | 8000 |
+| `frappe-bench-worker.service` | Background async worker | - |
+| `frappe-bench-schedule.service` | Scheduled job runner | - |
+| `frappe-bench-socketio.service` | Realtime WebSocket server | 9000 |
+| `frappe-bench-watch.service` | File watcher (dev/assets) | - |
+
+### Management
+
+```bash
+# View status of all services
+systemctl status frappe-bench-web.service
+
+# Start/Stop all services
+systemctl start frappe-bench.target
+systemctl stop frappe-bench.target
+
+# View logs
+journalctl -u frappe-bench-web.service -f
+journalctl -u frappe-bench-worker.service -f
+```
+
+### Installation
+
+```bash
+sudo cp deploy/frappe-bench-*.service deploy/frappe-bench.target /etc/systemd/system/
+sudo cp deploy/bench-env.sh /opt/erpnext/frappe-bench/bench-env.sh
+sudo systemctl daemon-reload
+sudo systemctl enable frappe-bench.target
+sudo systemctl start frappe-bench.target
+```
+
+### Credentials
+
+Admin credentials are stored in `/root/erpnext-admin-credentials.txt`.

deploy/bench-env.sh

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+#!/bin/bash
+# Environment wrapper for Frappe bench services
+export PATH="/opt/erpnext/home/.local/share/pipx/venvs/frappe-bench/bin:/opt/erpnext/frappe-bench/env/bin:$PATH"
+export HOME="/opt/erpnext/home"
+cd /opt/erpnext/frappe-bench
+exec "$@"

deploy/frappe-bench-schedule.service

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+[Unit]
+Description=Frappe Bench Scheduler
+Documentation=https://frappeframework.com
+After=network.target redis-server.service
+Requires=redis-server.service
+
+[Service]
+Type=simple
+User=erpnext
+Group=erpnext
+WorkingDirectory=/opt/erpnext/frappe-bench
+ExecStart=/opt/erpnext/frappe-bench/bench-env.sh bench schedule
+Restart=always
+RestartSec=10
+StandardOutput=append:/opt/erpnext/frappe-bench/logs/schedule.log
+StandardError=append:/opt/erpnext/frappe-bench/logs/schedule.error.log
+
+[Install]
+WantedBy=multi-user.target

deploy/frappe-bench-socketio.service

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+[Unit]
+Description=Frappe Bench SocketIO (Realtime)
+Documentation=https://frappeframework.com
+After=network.target redis-server.service
+Requires=redis-server.service
+
+[Service]
+Type=simple
+User=erpnext
+Group=erpnext
+WorkingDirectory=/opt/erpnext/frappe-bench
+ExecStart=/opt/erpnext/frappe-bench/bench-env.sh bench socketio
+Restart=always
+RestartSec=10
+StandardOutput=append:/opt/erpnext/frappe-bench/logs/socketio.log
+StandardError=append:/opt/erpnext/frappe-bench/logs/socketio.error.log
+
+[Install]
+WantedBy=multi-user.target

deploy/frappe-bench-watch.service

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+[Unit]
+Description=Frappe Bench File Watcher (Development)
+Documentation=https://frappeframework.com
+After=network.target
+PartOf=frappe-bench-web.service
+
+[Service]
+Type=simple
+User=erpnext
+Group=erpnext
+WorkingDirectory=/opt/erpnext/frappe-bench
+ExecStart=/opt/erpnext/frappe-bench/bench-env.sh bench watch
+Restart=always
+RestartSec=10
+StandardOutput=append:/opt/erpnext/frappe-bench/logs/watch.log
+StandardError=append:/opt/erpnext/frappe-bench/logs/watch.error.log
+
+[Install]
+WantedBy=multi-user.target

deploy/frappe-bench-web.service

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+[Unit]
+Description=Frappe Bench Web Server (ERPNext)
+Documentation=https://frappeframework.com
+After=network.target redis-server.service
+Requires=redis-server.service
+
+[Service]
+Type=simple
+User=erpnext
+Group=erpnext
+WorkingDirectory=/opt/erpnext/frappe-bench
+ExecStart=/opt/erpnext/frappe-bench/bench-env.sh bench serve --port 8000
+Restart=always
+RestartSec=10
+StandardOutput=append:/opt/erpnext/frappe-bench/logs/web.log
+StandardError=append:/opt/erpnext/frappe-bench/logs/web.error.log
+
+[Install]
+WantedBy=multi-user.target

deploy/frappe-bench-worker.service

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+[Unit]
+Description=Frappe Bench Background Worker
+Documentation=https://frappeframework.com
+After=network.target redis-server.service
+Requires=redis-server.service
+
+[Service]
+Type=simple
+User=erpnext
+Group=erpnext
+WorkingDirectory=/opt/erpnext/frappe-bench
+ExecStart=/opt/erpnext/frappe-bench/bench-env.sh bench worker
+Restart=always
+RestartSec=10
+StandardOutput=append:/opt/erpnext/frappe-bench/logs/worker.log
+StandardError=append:/opt/erpnext/frappe-bench/logs/worker.error.log
+
+[Install]
+WantedBy=multi-user.target

deploy/frappe-bench.target

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+[Unit]
+Description=Frappe Bench (ERPNext) - All Services
+Documentation=https://frappeframework.com
+Requires=redis-server.service
+After=redis-server.service network.target
+Wants=frappe-bench-web.service frappe-bench-worker.service frappe-bench-schedule.service frappe-bench-socketio.service frappe-bench-watch.service
+
+[Install]
+WantedBy=multi-user.target