Re-enable Eclair splice interop test once Eclair adopts standard splice feature bits #880

test_splice_in for Eclair is marked #[ignore] in tests/integration_tests_eclair.rs (via interop_scenario_test!).

Eclair advertises splicing via custom feature bit 154 (SplicePrototype) instead of the BOLT-standardized 62/63, so LDK and Eclair never negotiate splice on the channel.

Unblock: bump the pinned Eclair release once it advertises splice on bit 62/63, then drop #[ignore] on test_splice_in.

Context: PR #839 review thread.