Backend/Infra: ignore warn report prob (cold mode)

In cold storage mode, trying to send Sentry warnings would
cause an exception, but we want to ignore those, otherwise
we would crash and the wallet would never be able to run
offline.

src/GWallet.Backend/Infrastructure.fs

@@ -128,8 +128,20 @@ module Infrastructure =
             raise ex
         false
 #else
-        let ev = SentryEvent(ex, Level = errorLevel)
-        ReportInner ev
+        try
+            let ev = SentryEvent(ex, Level = errorLevel)
+            ReportInner ev
+        with
+        | ex ->
+            if errorLevel = ErrorLevel.Error then
+                reraise()
+
+                //unreachable
+                false
+
+            else
+                // e.g. if in cold-storage mode, trying to report a warning would cause a crash, but let's ignore it:
+                false
 #endif
 
     let ReportWarning (ex: Exception): bool =