scripts/run_first_run_e2e.py runs the real Ingestion -> Baseline -> Modelling
pipeline against the DB by composing build_first_run_pipeline + dispatch_first_run
with the live source clients (the Lambda handler can't run locally — its
_source_clients_from_env still raises, #1136). Unlike run_modelling_e2e it runs
real ingestion (persists EPC/spatial/solar) and has no inspect-only mode, so it's
gated behind --confirm (preview otherwise); measure scoping comes only from the
Scenario's exclusions (the pipeline threads no --measures), and the modelling
batch is all-or-nothing, both documented.
Extract the shared env/engine/S3 plumbing into scripts/e2e_common.py (public
load_env/build_engine/s3_parquet_reader) so both runners share one source and
neither imports the other's privates.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
