Bump ldk-node f13fcea -> f43d869 (90s wallet-sync timeout + LSPS4 fee_claim arg)

Moves the ldk-node pin to the tip of
lsp-0.7.0_accept-underpaying-htlcs_with_timing_logs, picking up:
- ldk-node#39: LDK_WALLET_SYNC_TIMEOUT_SECS 10 -> 90, and
- ldk-node#37: optional fee_claim on the LSPS4 liquidity source.

Together with rust-lightning#22 (parallel Esplora tx_sync, already in via
ldk-node's rust-lightning rev) and the prod Esplora rate-limit raise
(lightning-node#838), this stops the TxSyncTimeout -> NAPI panic on cold
webhook-node boots.

API adaptation: ldk-node#37 added a fee_claim: Option<String> arg to
Builder::set_liquidity_source_lsps4; pass None to preserve prior behavior.

bitcoin-payment-instructions stays at main's bdcef061 (no change here).

Author: martinmdk21

Cargo.lock

@@ -18,7 +18,7 @@ bitcoin-payment-instructions = { git = "https://github.com/moneydevkit/bitcoin-p
   "http",
 ] }
 # Branch: https://github.com/moneydevkit/ldk-node/commits/lsp-0.7.0_accept-underpaying-htlcs_with_timing_logs
-ldk-node = { default-features = false, git = "https://github.com/moneydevkit/ldk-node.git", rev = "f13fcead7e02ef4b77489a83854f204de11e902b" }
+ldk-node = { default-features = false, git = "https://github.com/moneydevkit/ldk-node.git", rev = "f43d869b8ba6ee743c412663d723269d6344df8d" }
 #ldk-node = { path = "../ldk-node" }
 
 napi        = { version = "2", features = ["napi4"] }

Cargo.toml

@@ -513,7 +513,9 @@ impl MdkNode {
     let logger_arc = Arc::clone(logger_instance());
     let logger: Arc<dyn LogWriter> = logger_arc;
     builder.set_custom_logger(logger);
-    builder.set_liquidity_source_lsps4(lsp_node_id, lsp_address);
+    // Third arg is the optional LSPS4 fee_claim (added in ldk-node #37). None
+    // preserves prior behavior (no fee claim configured).
+    builder.set_liquidity_source_lsps4(lsp_node_id, lsp_address, None);
 
     if let Some(scoring) = options.scoring_param_overrides {
       let mut fee_params = ProbabilisticScoringFeeParameters::default();