f - Update LSPS2BOLT12Router docs to reflect combined path behavior

Co-Authored-By: HAL 9000

Author: tnull

lightning-liquidity/src/lsps2/router.rs

@@ -45,8 +45,10 @@ pub struct LSPS2Bolt12InvoiceParameters {
 /// A router wrapper that injects LSPS2-specific BOLT12 blinded paths for registered intercept
 /// SCIDs while delegating all other blinded path creation behaviors to the inner routers.
 ///
-/// For **payment** blinded paths (in invoices), it returns the intercept SCID as the forwarding
-/// hop so that the LSP can intercept the HTLC and open a JIT channel.
+/// For **payment** blinded paths (in invoices), it appends paths using the intercept SCID as the
+/// forwarding hop so that the LSP can intercept the HTLC and open a JIT channel. Paths from the
+/// inner router (e.g., through pre-existing channels) are included as well, allowing payers to
+/// use existing inbound liquidity when available.
 ///
 /// For **message** blinded paths (in offers), it injects the intercept SCID as the
 /// [`MessageForwardNode::short_channel_id`] so that [`Event::HTLCIntercepted`] is emitted when the