Follow-ups to #792

[tnull]

• Codex review:

• [P1] trust_peer_0conf is only honored for LSPS2-discovered LSPs: /home/tnull/worktrees/ldk-node/pr-792/src/event.rs:1323. add_liquidity_source(..., true) documents generic 0-conf trust for the LSP (/home/tnull/worktrees/ldk-node/pr-792/src/builder.rs:448, /home/tnull/worktrees/ldk-node/pr-
  792/src/liquidity/mod.rs:117), but inbound acceptance only looks up protocol 2. LSPS1-only LSPs, or trusted LSPs before/after failed LSPS0 discovery, now fall through to accept_inbound_channel instead of accept_inbound_channel_from_trusted_peer. The trust lookup should be by node id
  independent of protocol; keep the LSPS2 protocol check only for accept_underpaying_htlcs.

• Codex nit:

• [P3] Three new files have CRLF line endings, so git diff --check upstream/main...HEAD reports trailing whitespace on every line: /home/tnull/worktrees/ldk-node/pr-792/src/liquidity/client/mod.rs:1, /home/tnull/worktrees/ldk-node/pr-792/src/liquidity/service/mod.rs:1, /home/tnull/worktrees/
  ldk-node/pr-792/src/liquidity/service/lsps2.rs:1. cargo fmt tolerates it, but diff whitespace checks will fail. Normalize those files to LF.

• The PR made LSP functionalities always enabled (dropped the Ignoring CMH default). We might want to revisit that decision in conjuction with Introduce Rust features #900, as we might want to add features to enable LSP {client,service} functionalities. It might prove to be hard to do this from an API-design perspective, we'll see.