Fix undo path parameters being passed with JSON string quotes (#3197)

The `request_parameter_with_value` step stored raw JSON-encoded values
(e.g., `"uuid"` with quotes) into `path_parameters`. When undo operations
used these values, the quotes got URL-encoded as `%22`, causing VCR
cassette path mismatches. Deserialize with `json.loads()` before storing
to match how `request_parameter` already handles this correctly.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: nogates

tests/conftest.py

@@ -459,9 +459,9 @@ def request_parameter_with_value(context, name, value, path_parameters):
     tpl = Template(value).render(**context)
     param_name = escape_reserved_keyword(snake_case(name))
     context["api_request"]["kwargs"][param_name] = tpl
-    # Store in path_parameters for undo operations
-    path_parameters[name] = tpl
-    path_parameters[param_name] = tpl
+    # Store in path_parameters for undo operations (deserialize to strip JSON encoding)
+    path_parameters[name] = json.loads(tpl)
+    path_parameters[param_name] = json.loads(tpl)
 
 
 def assert_no_unparsed(data):