chore(back): add wue value to saved emissions data in db

Author: SaboniAmine

carbonserver/carbonserver/api/schemas.py

@@ -88,7 +88,9 @@ class EmissionBase(BaseModel):
         ..., ge=0, description="The ram_energy must be greater than zero"
     )
     wue: Optional[float] = Field(
-        default=0, ge=0, description="The WUE (Water Usage Effectiveness) must be greater than or equal to zero"
+        default=0,
+        ge=0,
+        description="The WUE (Water Usage Effectiveness) must be greater than or equal to zero",
     )
 
     class Config:

carbonserver/carbonserver/database/alembic/versions/3212895acafd_add_wue_to_emissions.py

@@ -0,0 +1,34 @@
+"""add_wue_to_emissions
+
+Revision ID: 3212895acafd
+Revises: 2a898cf81c3e
+Create Date: 2025-10-19 21:29:36.800401
+
+"""
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "3212895acafd"
+down_revision = "2a898cf81c3e"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    """
+    Add WUE (Water Usage Effectiveness) field to emissions table.
+    Default value is 0 (no water usage).
+    """
+    op.add_column(
+        "emissions",
+        sa.Column("wue", sa.Float, nullable=False, server_default="0"),
+    )
+
+
+def downgrade():
+    """
+    Remove WUE field from emissions table.
+    """
+    op.drop_column("emissions", "wue")