Updated the 6.0.4 migration to use `http://localhost:8081/v1` for the default OpenAI model configurations (gpt‑4 and gpt‑3.5‑turbo) and the local embed service. Adjusted `OpenAIClient` to default to the same localhost base URL instead of the production OpenAI API.
Reorganized imports and module ordering in `src/main.rs` (moved `mod llm`, `mod nvidia`, and `BotOrchestrator` import), cleaned up formatting, and removed unused imports. These changes streamline development by directing LLM calls to a local server and improve code readability.
Removed the default server configuration section from migrations as these values should now be managed through environment variables. Updated default database username from 'postgres' to 'gbuser' in bootstrap and changed default database name from 'gbuser' to 'botserver' in config to align with the removed server configuration defaults.
