Improve warning message on accidental component type change (#11456)

### What

Title.

Author: grtlr

crates/store/re_chunk/src/iter.rs

@@ -347,7 +347,7 @@ where
 {
     let Some(values) = array.downcast_array_ref::<ArrowPrimitiveArray<P>>() else {
         if cfg!(debug_assertions) {
-            panic!("downcast failed for {component_descriptor}, data discarded");
+            panic!("[DEBUG ASSERT] downcast failed for {component_descriptor}, data discarded");
         } else {
             re_log::error_once!("downcast failed for {component_descriptor}, data discarded");
         }

crates/store/re_chunk_store/src/writes.rs

@@ -382,9 +382,12 @@ impl ChunkStore {
                 && old_typ != list_array.value_type()
             {
                 re_log::warn_once!(
-                    "Component column '{}' changed type from {old_typ:?} to {:?}",
+                    "Component '{}' with component type '{}' on entity '{}' changed type from {} to {}",
+                    component_descr.component,
                     component_type,
-                    list_array.value_type()
+                    chunk.entity_path(),
+                    re_arrow_util::format_data_type(&old_typ),
+                    re_arrow_util::format_data_type(&list_array.value_type())
                 );
             }