verbose live UI + tool-level SSE events + Groq default + regression tests

api/config.py

@@ -6,10 +6,26 @@ from pydantic_settings import BaseSettings
 class Settings(BaseSettings):
     database_url: str = "postgresql://nvi:nvi@postgres:5432/nvi"
 
+    # Active dataset. Matches: api/datasets/<name>/, the Postgres schema, and
+    # ctrl/seed/data/<name>.sqlite. Restart the api to switch.
+    dataset: str = "financial"
+
+    # LLM provider. Supported: "groq", "anthropic", "openai".
+    llm_provider: str = "groq"
+
     anthropic_api_key: str = ""
     anthropic_model: str = "claude-sonnet-4-6"
 
-    langfuse_host: str = "http://lng.local.ar:3000"
+    # Groq is OpenAI-API-compatible; we hit it via the openai SDK with a base_url override.
+    groq_api_key: str = ""
+    groq_model: str = "llama-3.3-70b-versatile"
+    groq_base_url: str = "https://api.groq.com/openai/v1"
+
+    openai_api_key: str = ""
+    openai_model: str = "gpt-4o-mini"
+    openai_base_url: str = "https://api.openai.com/v1"
+
+    langfuse_host: str = "http://lng.local.ar"
     langfuse_public_key: str = ""
     langfuse_secret_key: str = ""