Feat: PromptMemoryEntry Table Added for more Extensible Target Logic

[rlundeen2]

Description

This PR refactors our database entries so we can extend for future more complicated use. The main changes are in memory_models and stem from there. This is the data structure targets will interact with going forward, and have access to an array of these structures in methods like send_prompt.

Additionally, these changes were also added

• Removed sqlalchemy/duckdb specific code from memory_interface
• Added flag to not add embeddings to memory
• Consolidating test mock in one place
• Adding orchestrator labels automatically

In order to keep this small, there is some lingering code debt that will be prioritized:

• labels for normalizer_id is deprecated; we'll be using the orchestrator field in memory for this
• I've deprecated the add_chat_message_to_memory; they don't quite make sense with this new structure. However, plumbing these out will go in a subsequent PR.

Tests

All notebooks execute without error as of commit c3b2dfd