Clean up 5 years of sales data and build repeatable monthly reports

Honest description of the mess: our regional sales team has been logging deals in a mix of spreadsheets and an old CRM export since 2021, with inconsistent customer names, duplicate entries, and three different date formats. We distribute commercial kitchen equipment across the Midwest - about 11k deals total, so this is very fixable, just tedious. The job is to dedupe and standardize the historical data into a clean PostgreSQL schema we host, document the cleaning rules you applied so we can trust the numbers, and set up a monthly reporting query pack: revenue by region and rep, top accounts, product mix, and year-over-year comparisons. Reports can be plain SQL outputs to CSV - we do not need dashboards yet. Good first project with us if the trial goes well; we have a backlog of analytics wants. Clear written communication is essential because nobody on our team is technical.