V1 WebSocket — stream real-time event and market updates

Establishes a WebSocket connection for streaming V1 event updates and V2 market price deltas.

Connection: wss://therundown.io/api/v1/ws?key=YOUR_API_KEY

Filter parameters (query string):

• affiliate_ids — comma-separated affiliate IDs
• sport_ids — comma-separated sport IDs (V1 messages only)
• event_ids — comma-separated event IDs
• date — date filter in YYYY-MM-DD format (V1 messages only)

Heartbeat: Every 15 seconds.

Message queue: 256-message buffer. Messages dropped if client falls behind.