chore: read Fireworks key from repo secret 'fireworks_api_huggingface' (+fallbacks)

llm_provider.py

@@ -10,7 +10,7 @@ load_dotenv()
 log = logging.getLogger("fraud-analyst")
 logging.basicConfig(level=logging.INFO)
 
-FIREWORKS_API_KEY = os.getenv("FIREWORKS_API_KEY") or os.getenv("HF_TOKEN")
+FIREWORKS_API_KEY = os.getenv("fireworks_api_huggingface") or os.getenv("HF_TOKEN")
 FW_PRIMARY_MODEL   = os.getenv("FW_PRIMARY_MODEL",   "openai/gpt-oss-20b")
 FW_SECONDARY_MODEL = os.getenv("FW_SECONDARY_MODEL", "Qwen/Qwen3-Coder-30B-A3B-Instruct")
 

tools.py

@@ -47,7 +47,7 @@ def sanctions_pep_tool(csv_text: str) -> str:
 class CreditCSVInput(BaseModel):
     csv_text: str = Field(..., description="Credit CSV text")
 
-@tool("credit_risk_tool", args_schema=CreditCSVInput)
+@tool("credit_risk_tool", args_schema=CreditCSVInput, description="Credit risk rules: score<600, utilization>0.8, DTI>0.4, defaults>0, income<30000.")
 def credit_risk_tool(csv_text: str) -> str:
     """Score credit risk using simple rules → risk_score, risk_level. Returns counts + sample."""
     df = _csv_text_to_df(csv_text)