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app/schemas/fundamental.py

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+"""Pydantic schemas for fundamental data endpoints."""
+
+from __future__ import annotations
+
+from datetime import datetime
+
+from pydantic import BaseModel
+
+
+class FundamentalResponse(BaseModel):
+    """Envelope-ready fundamental data response."""
+
+    symbol: str
+    pe_ratio: float | None = None
+    revenue_growth: float | None = None
+    earnings_surprise: float | None = None
+    market_cap: float | None = None
+    fetched_at: datetime | None = None