fix: detect NIP-77 NOTICE immediately during negentropy sync

Previously, when a relay didn't support NIP-77, the negentropy_sync_diff
function would wait for the full client.sync() timeout even after receiving
a NOTICE message that marked the relay as not supporting NIP-77.

This change uses tokio::select! to race the sync operation against a
polling task that checks the nip77_supported flag every 10ms. When a NOTICE
is received (detected in the message handler), the poll task detects the
status change and immediately returns an error, allowing quick fallback to
REQ+EOSE without waiting for timeouts.

Benefits:
- Fast failure (within 10ms) when relay sends NIP-77 NOTICE
- No artificial timeout reduction that could hurt legitimate operations
- Maintains full timeout for relays that actually support NIP-77

0 files changed, 0 insertions, 0 deletions