fix(plantes): PlantImage __tablename__ explicite + varieties Field(default_factory=list)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/models/plant.py

@@ -92,10 +92,12 @@ class PlantWithVarieties(SQLModel):
     created_at: Optional[datetime] = None
     associations_favorables: Optional[List[str]] = None
     associations_defavorables: Optional[List[str]] = None
-    varieties: List[PlantVariety] = []
+    varieties: List[PlantVariety] = Field(default_factory=list)
 
 
 class PlantImage(SQLModel, table=True):
+    __tablename__ = "plant_image"
+
     id: Optional[int] = Field(default=None, primary_key=True)
     plant_id: int = Field(foreign_key="plant.id", index=True)
     filename: str