feat(predict): adds RTDS WebSocket connection for live crypto price streaming

[ghgoodreau]

Add third WebSocket connection type to WebSocketManager for Polymarket's RTDS stream (wss://ws-live-data.polymarket.com).
Subscribes to crypto_prices topic with configurable symbol filters, sends heartbeat every 5s, throttles callbacks to ~60fps via buffer/flush, reconnects with exponential backoff, and pauses on app background.
Wired through provider and controller layers with a new useLiveCryptoPrices hook.

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Feature: my feature name

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✅ E2E Fixture Validation — Schema is up to date
15 value mismatches detected (expected — fixture represents an existing user).
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