feat: add fundamentals parity reporting

app/services/fundamentals_api_service.py

@@ -121,6 +121,7 @@ def _build_metrics(derived, peer_derived, two: str | None) -> list[dict[str, Any
             "industry": industry,
             "period_end": _iso(series.period_end) if series else None,
             "filed_date": _iso(series.filed_date) if series else None,
+            "caveat": series.caveat if series else None,
             "source": "sec",
         })
     return out
@@ -303,7 +304,8 @@ async def _latest_close(db, ticker_id: int) -> tuple[float, date] | None:
 
 def _empty_metrics() -> list[dict[str, Any]]:
     return [{"key": k, "value": None, "history": [], "industry": None,
-             "period_end": None, "filed_date": None, "source": "sec"} for k in METRIC_KEYS]
+             "period_end": None, "filed_date": None, "caveat": None,
+             "source": "sec"} for k in METRIC_KEYS]
 
 
 def _empty_earnings() -> dict[str, Any]: