Add a full-stack mint and burn test for Bitcoin and Monero

Fixes where ram_scanned is updated in processor. The prior version, while safe,
would redo massive amounts of work during periods of inactivity. It also hit an
undocumented invariant where get_eventuality_completions assumes new blocks,
yet redone work wouldn't have new blocks.

Modifies Monero's generate_blocks to return the hashes of the generated blocks.

processor/src/networks/mod.rs

@@ -336,6 +336,8 @@ pub trait Network: 'static + Send + Sync + Clone + PartialEq + Eq + Debug {
 
   /// Get the registered eventualities completed within this block, and any prior blocks which
   /// registered eventualities may have been completed in.
+  ///
+  /// This will panic if not fed a new block.
   async fn get_eventuality_completions(
     &self,
     eventualities: &mut EventualitiesTracker<Self::Eventuality>,