missing session prompt in default configuration (MemMachine#760)

fixes a missing default configuration value for the session prompt field,
which is required by semantic memory. The default value is now set to
["profile_prompt"] instead of an empty list.

Key Changes:

- Updated the default value for PromptConf.session from an empty list to
  ["profile_prompt"]
- Added test assertions to verify both session and profile prompts
  contain "profile_prompt"]

Author: jealous

src/memmachine/common/configuration/__init__.py

@@ -96,7 +96,7 @@ class PromptConf(YamlSerializableMixin):
         description="The default prompts to use for semantic role memory",
     )
     session: list[str] = Field(
-        default=[],
+        default=["profile_prompt"],
         description="The default prompts to use for semantic session memory",
     )
     episode_summary_system_prompt_path: str = Field(

tests/memmachine/installation/test_configuration_wizard.py

@@ -60,6 +60,9 @@ def test_configuration_with_prompt(mock_input, conf_args):
         assert embedder.api_key.get_secret_value() == "api_key_value"
         assert embedder.base_url == "https://api.my-openai.com/v1"
         assert embedder.dimensions == 1536
+    prompt = config.prompt
+    assert "profile_prompt" in prompt.session
+    assert "profile_prompt" in prompt.profile
 
 
 @patch("builtins.input")