Fetches a sitemap belonging to the property, extracts its URLs, and joins them with Search Console page performance over a date range. Each URL gets its clicks, impressions, CTR, and average position (zeros if the page has no GSC data). Reports how many sitemap URLs actually received impressions (indexedInGscCount). The warehouse reads the sitemap URLs themselves, so a zero is exact. The live API cannot, so it pages through the property's pages (top 100,000 by clicks at most) until every URL is found; truncated: true means some URLs were not reached, so their zeros are unknown rather than "no impressions" (scanLimit is the rows read). Expands one level of a sitemap index (up to 5 child sitemaps; a child that cannot be read is named in childSitemapNote instead of failing the call), caps extracted URLs at maxUrls (default 500, max 2000), and only fetches http(s) URLs on the property host or a subdomain of it. Served from the ClickHouse warehouse when available, otherwise the live Search Console API (see dataSource). The sitemap is fetched with the user agent "GSCWizard-Bot/1.0 (On-Page SEO Checker)"; if the server blocks it (403/401/429) or no URLs come back, relay the whitelisting advice in the error or crawlNote. Date range is optional: omit startDate/endDate to analyze the last 28 settled days (data lags ~2-3 days).
