added vegetation

api/app/models/link.py

@@ -3,6 +3,7 @@ from typing import Literal
 from pydantic import BaseModel, Field
 
 from app.models.coverage import LinkRx, LinkTx
+from app.models.terrain import Obstruction
 
 
 class LinkBudgetRequest(BaseModel):
@@ -26,3 +27,10 @@ class LinkBudgetResponse(BaseModel):
     fade_margin_db: float
     fresnel_clear: bool
     link_viable: bool
+    los_clear: bool
+    geometric_los: bool
+    first_fresnel_clearance_pct: float
+    fresnel_violations_count: int
+    geometric_obstructions_count: int
+    building_obstructions_count: int
+    worst_obstruction: Obstruction | None