make pnp ip configurable

[benderl]

ui: openWB/openwb-ui-settings#997

closes https://github.com/openWB/internal-projects/issues/175
closes #3365

[Copilot]

Pull request overview

Implements a configurable Plug’n’Play (PnP) virtual IP address (instead of a hard-coded 192.168.193.250/24) by introducing a new persisted MQTT config topic and wiring it through network setup, config defaults, validation, and ACLs.

Changes:

• Add new system config topic openWB/system/pnp_ip (with default {address, prefix}) and allow it in config update defaults/validation.
• Update runs/setup_network.sh to read and validate pnp_ip from MQTT and apply it via ip addr add/del.
• Extend Mosquitto dynamic-security ACL templates to allow publishing/receiving the new topic and bump ACL template version.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
runs/setup_network.sh	Reads openWB/system/pnp_ip from MQTT, validates it, and configures the PnP IP on the primary interface.
packages/helpermodules/update_config.py	Adds openWB/system/pnp_ip (and mac_address) to allowed topics and publishes default values.
packages/helpermodules/subdata.py	Detects pnp_ip changes and notifies users that a restart is required.
packages/helpermodules/setdata.py	Allows setting openWB/set/system/pnp_ip with JSON payload validation.
data/config/mosquitto/public/default-dynamic-security.json	Adds ACLs for the new topic and bumps the template ACL version marker.

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