bug: notify.py crashes on non-string targets due to unguarded json.loads() (TypeError)

## Summary In `custom_components/alexa_media/notify.py` (lines 219–229), `json.loads(target)` is called without a type guard. Non-string target entries (e.g., dict, list, int) raise `TypeError`, which is **not** caught by the `except json.JSONDecodeError` clause. This aborts the entire notification send path for any non-string target. The existing tests explicitly document that "non-string targets are passed through unchanged", but this contract is broken at runtime. ## Severity **Blocker** — any non-string target in `ATTR_TARGET` will raise an unhandled `TypeError` and abort `async_send_message`. ## Proposed Fix Add an `isinstance(target, str)` guard before calling `json.loads()` and append non-string targets directly to `processed_targets`: ```python for target in targets: _LOGGER.debug("Processing: %s", target) if not isinstance(target, str): processed_targets.append(target) _LOGGER.debug("Processed non-string target: %s", processed_targets) continue try: parsed = json.loads(target) if isinstance(parsed, list): processed_targets.extend(parsed) else: processed_targets.append(parsed) _LOGGER.debug("Processed Target by json: %s", processed_targets) except json.JSONDecodeError: if "," in target: processed_targets += [item.strip() for item in target.split(",") if item.strip()] else: processed_targets.append(target.strip()) _LOGGER.debug("Processed Target by string: %s", processed_targets) ``` Also add a regression test for non-string target pass-through in `tests/test_notify.py`. ## References - Introduced in: #3446 (by @danielbrunt57) - Identified in: #3450 - Requested by: @alandtse