Problem

In service.rs, handle_htlc_safe caught all errors from handle_htlc_inner and responded with "result": "continue" while only logging at debug! level. This silently swallowed failures during JIT channel opening - most critically, fundchannel failures caused by insufficient on-chain balance. The paying node received no failure signal and the operator had no actionable log output

Fix

Replace the catch-all continue with a typed dispatch on HtlcError:

• HtlcError::FundChannel -> warn! (operator action required) + TEMPORARY_CHANNEL_FAILURE
• HtlcError::ChannelReadyCheck -> warn! + TEMPORARY_CHANNEL_FAILURE
• HtlcError::CapacityQuery -> error! + TEMPORARY_CHANNEL_FAILURE
  The outer handle_htlc_safe still catches truly unexpected errors (deserialization and stuff like that) and continues, which is the correct behaviour for unknown failures

Checklist

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• The changelog has been updated in the relevant commit(s) according to the guidelines.
• Tests have been added or modified to reflect the changes.
• Documentation has been reviewed and updated as needed.
• Related issues have been listed and linked, including any that this PR closes.
• Important All PRs must consider how to reverse any persistent changes for tools/lightning-downgrade