docs(app): lock P2 dashboard auth/config/review decisions + data model (#84)

feat(app): P3 (partial) — record quote failures + ops view + schema migration

feat(app): P2 2e — batch-measurement edit (customer quotes locked)

feat(app): P1d — Postgres (Neon) backend behind a dialect-aware Database

feat(app): P1b — persist captured leads to a durable table

feat(app): P1a — durable run ledger (SQLite) replaces in-memory metering

feat(app): unified per-tenant quote metering (#61)