Primary cache: do not err on PrimaryNotFound (#4892)

Ignore `PrimaryNotFound` errors on the cached entity_iterator path, the
same way the vanilla path does.

- Fixes #4858
- DNR: requires #4856

### Checklist
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- [PR Build Summary](https://build.rerun.io/pr/4892)
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crates/re_space_view_spatial/src/visualizers/entity_iterator.rs

@@ -183,7 +183,7 @@ macro_rules! impl_process_archetype {
                     space_view_class_identifier: view_ctx.space_view_class_identifier(),
                 };
 
-                ctx.entity_db.query_caches().[<query_archetype_with_history_pov$N _comp$M>]::<A, $($pov,)+ $($comp,)* _>(
+                match ctx.entity_db.query_caches().[<query_archetype_with_history_pov$N _comp$M>]::<A, $($pov,)+ $($comp,)* _>(
                     ctx.app_options.experimental_primary_caching_latest_at,
                     ctx.app_options.experimental_primary_caching_range,
                     ctx.entity_db.store(),
@@ -212,7 +212,15 @@ macro_rules! impl_process_archetype {
                             );
                         }
                     }
-                )?;
+                ) {
+                    Ok(_) | Err(QueryError::PrimaryNotFound(_)) => {}
+                    Err(err) => {
+                        re_log::error_once!(
+                            "Unexpected error querying {:?}: {err}",
+                            &data_result.entity_path
+                        );
+                    }
+                }
             }
 
             Ok(())