stats: core-7 economy page with CPI index levels, rebase and categories

- /stats/economy defaults multi-country charts to CAN KOR CHN JPN USA NLD CUW,
  with add-a-country chips and an EU 27 comparison line
- CPI index levels rebased to a chosen base year, index/YoY toggle,
  categories (food, energy, housing, core) where the source has them
- new no-key collectors: oecd (CPI categories, 10y yields), statcan (CPI);
  bis WS_LONG_CPI, FRED US CPI categories, Eurostat prc_hicp_minr, WB FP.CPI.TOTL
- Canada added as a region; CBS Curacao fallbacks for growth/unemployment
- timers stats-oecd and stats-statcan

scripts/stats/bis.ts

@@ -1,4 +1,5 @@
-// A5 BIS central bank policy rates (WS_CBPOL), monthly and daily, in one call each.
+// A5 BIS central bank policy rates (WS_CBPOL), monthly and daily, in one call each; plus the BIS
+// long consumer price series (WS_LONG_CPI, index 2010 = 100, monthly) → `bis:cpi:<area>`.
 import { getText, log, run, sql, writeSeries, type ObsRow, type SeriesRow } from './common';
 
 const AREAS: Record<string, { name: string; region: string | null }> = {
@@ -7,7 +8,26 @@ const AREAS: Record<string, { name: string; region: string | null }> = {
 	KR: { name: 'Bank of Korea', region: 'KOR' },
 	CN: { name: "People's Bank of China", region: 'CHN' },
 	GB: { name: 'Bank of England', region: 'GBR' },
-	JP: { name: 'Bank of Japan', region: 'JPN' }
+	JP: { name: 'Bank of Japan', region: 'JPN' },
+	CA: { name: 'Bank of Canada', region: 'CAN' }
+};
+
+/** WS_LONG_CPI areas (no Curaçao: its CPI comes from CBS Curaçao). */
+const CPI_AREAS: Record<string, string> = {
+	CA: 'CAN',
+	CN: 'CHN',
+	JP: 'JPN',
+	KR: 'KOR',
+	US: 'USA',
+	NL: 'NLD',
+	XM: 'EA',
+	DE: 'DEU',
+	FR: 'FRA',
+	BE: 'BEL',
+	GB: 'GBR',
+	IN: 'IND',
+	BR: 'BRA',
+	RU: 'RUS'
 };
 
 function parseCsv(text: string): Record<string, string>[] {
@@ -73,6 +93,35 @@ export async function bis(opts: { job: string }) {
 			log(`bis ${freq}: ${rows.length} rows`);
 			total += rows.length;
 		}
+		// Long consumer prices: unit 628 = index, 2010 = 100.
+		const cpiCsv = await getText(
+			`https://stats.bis.org/api/v2/data/dataflow/BIS/WS_LONG_CPI/1.0/M.${Object.keys(CPI_AREAS).join('+')}.628?format=csv`
+		);
+		const cpiObs: ObsRow[] = parseCsv(cpiCsv)
+			.filter((r) => r.REF_AREA in CPI_AREAS && /^\d{4}-\d{2}/.test(r.TIME_PERIOD ?? ''))
+			.filter((r) => r.OBS_VALUE !== '' && r.OBS_VALUE !== 'NaN')
+			.map((r) => ({
+				series_id: `bis:cpi:${r.REF_AREA}`,
+				period: `${r.TIME_PERIOD.slice(0, 7)}-01`,
+				value: Number(r.OBS_VALUE),
+				status: r.OBS_STATUS && r.OBS_STATUS !== 'A' ? r.OBS_STATUS : null
+			}));
+		const cpiSeries: SeriesRow[] = Object.entries(CPI_AREAS)
+			.filter(([code]) => cpiObs.some((o) => o.series_id === `bis:cpi:${code}`))
+			.map(([code, region]) => ({
+				series_id: `bis:cpi:${code}`,
+				source_id: 'bis',
+				source_code: `WS_LONG_CPI/M.${code}.628`,
+				title: 'Consumer prices (BIS long series)',
+				unit: 'Index 2010=100',
+				freq: 'M',
+				region_code: region,
+				theme: 'economy',
+				meta: { url: 'https://data.bis.org/topics/CPI' }
+			}));
+		await writeSeries(cpiSeries, cpiObs);
+		log(`bis cpi: ${cpiObs.length} obs`);
+		total += cpiObs.length;
 		return total;
 	});
 }