feat: add module self-declaration metadata

Added __amplifier_module_type__ for explicit type declaration.
Part of H-02 Phase 2: Module self-declaration migration.

Kernel now reads module type instead of guessing from naming.

🤖 Generated with [Amplifier](https://github.com/microsoft/amplifier)

Co-Authored-By: Amplifier <240397093+microsoft-amplifier@users.noreply.github.com>

Author: bkrabach

amplifier_module_loop_basic/__init__.py

@@ -2,6 +2,9 @@
 Basic orchestrator with complete event emissions (desired state).
 """
 
+# Amplifier module metadata
+__amplifier_module_type__ = "orchestrator"
+
 import logging
 from typing import Any
 from typing import Optional