The helper TRUNCATEd papers CASCADE and only then ran ingest_all.sh, which
failed on the missing chunks.section column (audit M-1) — leaving the corpus
wiped. Add a preflight that verifies chunks.section exists BEFORE the
destructive step and aborts early (no TRUNCATE) with the owner-level ALTER to
run, since the app user cannot alter postgres-owned tables.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
One-time, guarded migration for the C-7 id-format change: a plain re-ingest
would duplicate every paper (new bare-id row beside the old URL-id PK), so this
wipes (TRUNCATE papers CASCADE) and rebuilds via ingest_all.sh.
Safety: requires the SSH tunnel, prints a BEFORE snapshot, gates the TRUNCATE
behind an explicit 'MIGRATE' confirmation, then prints AFTER verification —
C-7 (url_form_ids should be 0) and C-1 via the real resolver-based
discovery_leads() (ingested papers leaked should be 0). Uses .venv psycopg
(psql is not installed); DATABASE_URL is sourced, never echoed.
Joins PR #13 (Wave 2). Read-only verification SQL validated against the live DB.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
