Add multi-factor conviction gate to activation

Make "qualified" mean an edge candidate, not just R:R + confidence.
The gate now also requires (all admin-configurable, defaults on):
- high conviction: recommended_action LONG_HIGH / SHORT_HIGH only
- clean read: risk_level Low (no contradicting signals)
- probable primary target: best target probability >= min (default 60)

- Shared predicate: app/services/qualification.py +
  frontend/src/lib/qualification.ts (mirrored)
- Activation config extended (min_target_probability,
  require_high_conviction, exclude_conflicts) with bool-aware
  get/update + validation
- /trades/performance switched to ?qualified_only=true, applying
  the full gate server-side; confidence breakdown stays unfiltered
- Dashboard "Qualified", Signals "Qualified only" toggle, and
  Track Record all use the one gate; Admin gains the new controls

Sentiment provider runtime config (prior change) included.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/routers/trades.py

@@ -67,9 +67,8 @@ async def get_activation_thresholds(
 
 @router.get("/trades/performance", response_model=APIEnvelope)
 async def get_trade_performance(
-    min_rr: float | None = Query(None, ge=0, description="Only setups with R:R >= this"),
-    min_confidence: float | None = Query(
-        None, ge=0, le=100, description="Only setups with confidence >= this"
+    qualified_only: bool = Query(
+        False, description="Restrict overall/direction/action stats to setups that clear the activation gate"
     ),
     _user=Depends(require_access),
     db: AsyncSession = Depends(get_db),
@@ -78,11 +77,12 @@ async def get_trade_performance(
 
     Outcomes are written by the nightly outcome_evaluator job (win = target
     hit first, loss = stop hit first, expired = neither within the window).
-    Optional min_rr / min_confidence filters apply to the overall, direction
-    and action breakdowns; the confidence breakdown always covers all setups
-    so thresholds can be validated against it.
+    With qualified_only, the overall/direction/action breakdowns cover only
+    setups clearing the activation gate; the confidence breakdown always
+    covers all setups so the gate can be validated against it.
     """
-    stats = await get_performance_stats(db, min_rr=min_rr, min_confidence=min_confidence)
+    config = await admin_service.get_activation_config(db) if qualified_only else None
+    stats = await get_performance_stats(db, config=config)
     return APIEnvelope(status="success", data=stats)