v1.7.2 - Fix EU Pool Escaped JSON Parsing

🐛 Critical Bug Fix

• Fix EU pool HTML parsing - Correctly handle escaped JSON strings from Next.js
• EU pool embeds JSON data as escaped strings (\"hashrate1m\":\"1110000000000\")
• Sensor now displays correct hashrate instead of "Unknown"

✅ Verified Working

Tested with real EU pool data:

• Hashrate: 1110 GH/s (1.11 TH/s) ✅
• 1-hour average: 1050 GH/s ✅
• 24-hour average: 1030 GH/s ✅

🔧 Technical Details

The EU pool's Next.js frontend escapes JSON data in JavaScript strings. This release adds proper regex patterns to extract data from the escaped format:

• Before: "hashrate1m":"..." ❌
• After: \"hashrate1m\":\"...\" ✅

Action Required: Restart Home Assistant to apply the fix.