Switch default DeepSeek model to v4 flash

Fix agent report file persistence

Adopt Tavily search backend

Add agent orchestration guardrails and timeouts

Run diligence jobs in background with polling

Keep long Space runs alive with heartbeat updates

Disable LangSmith tracing and harden report finalization

Sanitize environment values

Trigger Space rebuild

Add PDF reports history and LangSmith tracing

Deploy due diligence Gradio app

initial commit