Add active bill to light invoice endpoints (#370)

Author: tompro

src/service/bill_service.rs

@@ -3100,6 +3100,7 @@ pub struct LightBitcreditBillToReturn {
     pub drawer: LightIdentityPublicData,
     pub payee: LightIdentityPublicData,
     pub endorsee: Option<LightIdentityPublicData>,
+    pub active_notification: Option<Notification>,
     pub sum: String,
     pub currency: String,
     pub issue_date: String,
@@ -3113,6 +3114,7 @@ impl From<BitcreditBillToReturn> for LightBitcreditBillToReturn {
             drawer: value.drawer.into(),
             payee: value.payee.into(),
             endorsee: value.endorsee.map(|v| v.into()),
+            active_notification: value.active_notification,
             sum: value.sum,
             currency: value.currency,
             issue_date: value.issue_date,