Revert "Drop namespaces for wrapped records (#22)"

This reverts commit 60538cd.

Author: bentsku

src/py_avro_schema/_schemas.py

@@ -321,9 +321,10 @@ def _wrap_as_record(self, inner_schema: JSONObj, names: NamesType) -> JSONType:
         Handles deduplication via ``names``.
         """
         record_name = _avro_name_for_type(_type_from_annotated(self.py_type))
-        if record_name in names:
-            return record_name
-        names.append(record_name)
+        fullname = f"{self.namespace}.{record_name}" if self.namespace else record_name
+        if fullname in names:
+            return fullname
+        names.append(fullname)
         record_schema = {
             "type": "record",
             "name": record_name,
@@ -332,6 +333,8 @@ def _wrap_as_record(self, inner_schema: JSONObj, names: NamesType) -> JSONType:
                 {"name": REF_DATA_KEY, "type": inner_schema},
             ],
         }
+        if self.namespace:
+            record_schema["namespace"] = self.namespace
         return record_schema