v24.08.2 -- Steel Backed-up Channels

This point release addresses few crash fixes and includes an enhancement to remember and update channel hints for payments.

Changed

• pay: Now remembers and updates channel hints across payments.
• pay: Discarding an overly long or expensive route does not blacklist channels anymore.
• grpc: Channel type anchors/even was added to the grpc bindings.

Fixed

• gossipd: crash errors with large gossip_store (>4MB) growth on longer-running nodes.
• connectd: crash on erroneous timeout.
• Protocol: we could get confused on restart and not re-transmit our own channel_updates.
• rpc: listpeerchannels (and thus, pay) sped up on very large nodes.
• Improved pathfinding speed for large nodes.