Add S/R v2 research and validation harness

app/schemas/sr_level.py

@@ -15,7 +15,9 @@ class SRLevelResult(BaseModel):
     price_level: float
     type: Literal["support", "resistance"]
     strength: int = Field(ge=0, le=100)
-    detection_method: Literal["volume_profile", "pivot_point", "merged"]
+    detection_method: Literal[
+        "volume_profile", "pivot_point", "merged", "round_number"
+    ]
     created_at: datetime