Build `web_scrape_table(html_str)` — a tiny "extract rows from an HTML table" helper for scripts that don't want a BeautifulSoup dependency: - `html_str` contains one `<table>...</table>` with header row + body rows. - Each row is `<tr><td>cell1</td><td>cell2</td>...</tr>`. - First `<tr>` is the header row (column names). - Return a list of dicts, one per body row, keyed by header. - Empty/missing table → empty list. - Use simple string slicing — no regex, no html parser. The harness only feeds well-formed input.