Add BOLT12 support to LSPS2 flow#817
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tnull wants to merge 7 commits intolightningdevkit:mainfrom
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Enable local `rust-lightning` path patches and update API compatibility call sites by passing the new `onion_message_interceptor` argument to `LiquidityManager::new` and the `max_feerate` argument to `ChannelManager::splice_channel`. Co-Authored-By: HAL 9000
Wrap `DefaultRouter` in `LSPS2BOLT12Router`, register LSPS2 buy results against `OfferId`, and expose `Bolt12Payment` JIT receive APIs that create offers and route inbound blinded paths through LSPS2 intercept parameters. Co-Authored-By: HAL 9000
Update all `rust-lightning` crate dependencies to `https://github.com/tnull/rust-lightning` at `c26cafa86424de9e6199b2907e1a41674b1c6dcc`, which is the latest commit on `2026-03-lsps2-bolt12-alt`. Add a `[patch]` section for `https://github.com/lightningdevkit/rust-lightning` so transitive crates resolve to the same revision and avoid mixed `lightning` versions. Co-Authored-By: HAL 9000
Update all `rust-lightning` crate references and patch overrides to `ed27564855b399b5eecd59f2547d667d6f48c4f7`, the latest commit on `tnull/rust-lightning` branch `2026-03-lsps2-bolt12-alt`. Co-Authored-By: HAL 9000
Add an integration test that creates a BOLT12 JIT offer via LSPS2, restarts the LSP node after offer creation, and verifies payment still succeeds and opens the JIT channel path. Co-Authored-By: HAL 9000
Document the startup point where persisted LSPS2 BOLT12 offer registrations should be reloaded and re-registered on the router once storage plumbing is added. Co-Authored-By: HAL 9000
Update all `rust-lightning` crate references and patch overrides to `0e7bfa76774d087bac04cbc99e5625e2e17e014f`, the latest commit on branch `2026-03-lsps2-bolt12-alt`. Co-Authored-By: HAL 9000
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Based on #4463.
Draft for now.