Bump ldk-node to tip (parallel Esplora tx_sync + 90s wallet-sync timeout)

Catches lightning-js up to the ldk-node branch tip
(lsp-0.7.0_accept-underpaying-htlcs_with_timing_logs @ f43d869), which
pulls in:
- rust-lightning#22 parallel Esplora tx_sync (buffer_unordered) via
  ldk-node's rust-lightning rev, and
- ldk-node#39 raising LDK_WALLET_SYNC_TIMEOUT_SECS 10 -> 90.

Together these stop the TxSyncTimeout -> NAPI panic on cold webhook-node
boots now that prod Esplora's /api/ rate limits are raised (lightning-node
PR #838).

API adaptation: ldk-node#37 added an optional fee_claim arg to
Builder::set_liquidity_source_lsps4; pass None to preserve prior behavior.

bitcoin-payment-instructions stays pinned at bc7d03f (reqwest 0.12): the
ldk-node tip references bpi bdcef061 which moved to reqwest 0.13, and
matching it pulls a tower-http conflict against ldk-node's own reqwest
0.12 once bpi's http feature is enabled. Holding bpi at bc7d03f keeps a
single reqwest major in the tree (a duplicate-bpi compile already existed
pre-bump, so no regression).

Author: martinmdk21

Cargo.toml

@@ -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 = "5dce44b6e795560bbf62f49d3648308ce88a0586" }
+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"] }

src/lib.rs

@@ -457,7 +457,9 @@ 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();