Slice 3 of #1157. Persists a Plan and its Plan Measures to the live
plan / recommendation tables via SQLModel mirrors (ADR-0017).
- infrastructure/postgres/plan_table.py: PlanRow (`plan`) + RecommendationRow
(`recommendation`) mirrors. RecommendationRow adds the new `plan_id` FK
(ON DELETE CASCADE) linking each Plan Measure to its Plan, replacing the
plan_recommendations m2m for new writes. from_domain mappers convert CO2
kg → tonnes to match the live column contract and derive post_epc_rating
from the rounded SAP. Only the impact + cost + identity columns the tracer
fills are declared; energy/bill, U-value, valuation, labour, plan_type are
left to later slices.
- PlanRepository port + PlanPostgresRepository.save(plan, *, property_id,
scenario_id, portfolio_id, is_default) -> plan id. Idempotent replace:
deleting the Plan cascades to its recommendation rows via plan_id, so a
re-run overwrites (ADR-0012). No commit — the UoW owns the transaction.
2 tests (persist + idempotent re-run); pyright strict clean; 73 pass across
repositories/modelling/orchestration with no regressions.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
