Implement Bonjour/mDNS discovery of VDMX OSCQuery endpoint

[joaodotwork]

Description

Discover VDMX's OSCQuery HTTP endpoint automatically via Bonjour/ZeroConf (mDNS service type _oscjson._tcp), eliminating hardcoded URLs.

Tasks

• Add zeroconf dependency to pyproject.toml
• Implement mDNS browser for _oscjson._tcp services
• Resolve discovered service to HTTP URL (host + port)
• Handle VDMX not running / service not found gracefully
• Auto-reconnect when VDMX restarts and re-publishes

Acceptance Criteria

• Automatically discovers VDMX's OSCQuery endpoint without user configuration
• Falls back to manual URL if Bonjour discovery fails
• Logs discovered endpoint details

Technical Notes

• VDMX publishes OSCQuery on a dynamic port (found in Preferences → OSC → OSCQuery)
• Use Python zeroconf library for mDNS
• Spec: github.com/Vidvox/OSCQueryProposal