feat: persist floor heat-loss flags through the EPC round-trip 🟩

Add is_exposed_floor / is_above_partially_heated_space to
EpcFloorDimensionModel and wire from_domain + _to_floor_dimension. Column
names match the FE schema (feature/epc-pv-and-floor-heatloss-schema).
Live DB migration is run post-merge (drizzle-kit generate picks them up).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

infrastructure/postgres/epc_property_table.py

@@ -702,6 +702,11 @@ class EpcFloorDimensionModel(SQLModel, table=True):
     heat_loss_perimeter_m: float
     floor_insulation: Optional[int] = Field(default=None)
     floor_construction: Optional[int] = Field(default=None)
+    # Heat-loss flags (SAP 10.2 §3.3): a floor over outside air / over a
+    # partially-heated space takes a different U-value path. Default False
+    # matches the domain default for an ordinary ground floor.
+    is_exposed_floor: bool = Field(default=False)
+    is_above_partially_heated_space: bool = Field(default=False)
 
     @classmethod
     def from_domain(
@@ -716,6 +721,8 @@ class EpcFloorDimensionModel(SQLModel, table=True):
             heat_loss_perimeter_m=dim.heat_loss_perimeter_m,
             floor_insulation=dim.floor_insulation,
             floor_construction=dim.floor_construction,
+            is_exposed_floor=dim.is_exposed_floor,
+            is_above_partially_heated_space=dim.is_above_partially_heated_space,
         )
 
 

repositories/epc/epc_postgres_repository.py

@@ -812,6 +812,8 @@ class EpcPostgresRepository(EpcRepository):
             floor=f.floor,
             floor_insulation=f.floor_insulation,
             floor_construction=f.floor_construction,
+            is_exposed_floor=f.is_exposed_floor,
+            is_above_partially_heated_space=f.is_above_partially_heated_space,
         )
 
     @private