node: validate production in debug mode

Ensure that the production repository is validated after fetching and
performing deletions. This is to highlight any inconsistencies that
may show up between fetching and deleting references.

Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett

radicle-node/src/worker/fetch.rs

@@ -398,6 +398,16 @@ impl<'a> StagingPhaseFinal<'a> {
         let head = production.set_identity_head()?;
         log::debug!(target: "worker", "'refs/rad/id' for {} set to {head}", production.id);
 
+        #[cfg(test)]
+        // N.b. This is to prevent us from shooting ourselves in the
+        // foot with storage inconsistencies.
+        radicle::debug_assert_matches!(
+            production.validate(),
+            Ok(()),
+            "repository {} is not valid",
+            production.id,
+        );
+
         Ok((updates, remotes))
     }