Replaces sfr/principal_pitch/2_export_data.py, which read the retired
plan_recommendations m2m and recommendation_materials table. The new model
links a recommendation to its plan directly (recommendation.plan_id), keeps
materials inline on the recommendation (material_id), marks the chosen plan
per (scenario, property) with is_default, and stores post-works SAP/EPC and
savings on the plan row (the new SAP calculator's output).
Takes a portfolio id, resolves every modelled scenario (those with plans),
and writes one workbook with a properties sheet per scenario. EPC descriptive
fields are sourced live from the EPC service (property_details_epc is dead);
property_type falls back override -> cert.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
