feat(healthchat): ring calls via gateway VoIP push

CallKit rejects the NSE hand-off without the filtering entitlement.

UnitTests/Sources/ElementCallServiceTests.swift

@@ -26,7 +26,9 @@ final class ElementCallServiceTests {
         let dateProvider: () -> Date = {
             self.currentDate
         }
-        service = ElementCallService(callProvider: callProvider, timeProvider: TimeProvider(clock: clock, now: dateProvider))
+        service = ElementCallService(callProvider: callProvider,
+                                     timeProvider: TimeProvider(clock: clock, now: dateProvider),
+                                     appSettings: AppSettings.volatile())
     }
     
     isolated deinit {
@@ -57,6 +59,21 @@ final class ElementCallServiceTests {
         }
     }
     
+    /// HealthChat: a VoIP push requested from the push gateway carries the expiration as JSON seconds.
+    @Test
+    func incomingCallFromPushGatewayVoIPPush() async {
+        await waitForConfirmation { confirmation in
+            let pkPushPayloadMock = PKPushPayloadMock().updatingExpiration(secondsSince1970: currentDate.timeIntervalSince1970 + 30)
+            
+            service.pushRegistry(pushRegistry, didReceiveIncomingPushWith: pkPushPayloadMock, for: .voIP) {
+                confirmation()
+            }
+        }
+        
+        #expect(callProvider.reportNewIncomingCallWithUpdateCompletionCalled)
+        #expect(!callProvider.reportCallWithEndedAtReasonCalled)
+    }
+    
     @Test
     func incomingVoiceCall() async {
         #expect(!callProvider.reportNewIncomingCallWithUpdateCompletionCalled)
@@ -280,6 +297,11 @@ private nonisolated class PKPushPayloadMock: PKPushPayload {
         return self
     }
     
+    func updatingExpiration(secondsSince1970: TimeInterval) -> Self {
+        dict[ElementCallServiceNotificationKey.expirationDate.rawValue] = secondsSince1970
+        return self
+    }
+    
     func updateIsVoice(_ isVoice: Bool) -> Self {
         dict[ElementCallServiceNotificationKey.isVoiceCall.rawValue] = isVoice
         return self