Askrene and xpay improve#9150

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rustyrussell wants to merge 21 commits into

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rustyrussell:askrene-and-xpay-improve

Commits on May 20, 2026

askrene: add APIs for "impressions" which are *relative* constraints.
rustyrussell
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downgrade: we need to remove "impressions" from askrene datastore when downgrading to v26.06.
rustyrussell
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askrene: add an "impression" for when we succeeded on a payment.
rustyrussell
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xpay: actually tell askrene when a payment succeeded.
rustyrussell
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askrene: correctly order constraints.
rustyrussell
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pytest: add tests for what we want askrene to do.
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askrene: give clearer error codes.
rustyrussell
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offers: limit invoices to 10 minutes for recurring offers in other currencies.
rustyrussell
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offers: limit expiry to offer limit, or 10 minutes with currency conversion.
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fetchinvoice: don't bother with checking recurrence timing.
rustyrussell
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lightningd: don't do previous invoice checking in createinvoicerequest.
rustyrussell
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fetchinvoice: handle weird labels in recurrence_label parameter.
rustyrussell
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