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-fetch.ts

@@ -6,6 +6,8 @@
 //   bun scripts/stats-fetch.ts eurostat [--only=nrg_pc_204]
 //   bun scripts/stats-fetch.ts fred [--only=DCOILBRENTEU]
 //   bun scripts/stats-fetch.ts bis
+//   bun scripts/stats-fetch.ts oecd [--only=cpi,irlt]   OECD SDMX (CPI categories, 10y yields)
+//   bun scripts/stats-fetch.ts statcan                 Statistics Canada CPI (WDS)
 //   bun scripts/stats-fetch.ts worldbank|imf|owid [--only=…]
 //   bun scripts/stats-fetch.ts energycharts|rijksfinancien|ustreasury [--backfill]
 //   bun scripts/stats-fetch.ts usaspending
@@ -21,6 +23,8 @@ import { cbs, normaliseCbs } from './stats/cbs';
 import { eurostat } from './stats/eurostat';
 import { fred } from './stats/fred';
 import { bis } from './stats/bis';
+import { oecd } from './stats/oecd';
+import { statcan } from './stats/statcan';
 import { worldbank } from './stats/worldbank';
 import { imf } from './stats/imf';
 import { owid } from './stats/owid';
@@ -63,6 +67,12 @@ try {
 		case 'bis':
 			await bis({ job });
 			break;
+		case 'oecd':
+			await oecd({ only: value('only'), job });
+			break;
+		case 'statcan':
+			await statcan({ job });
+			break;
 		case 'worldbank':
 			await worldbank({ only: value('only'), job });
 			break;
@@ -119,7 +129,7 @@ try {
 			break;
 		default:
 			throw new Error(
-				`Unknown source "${source}" (cbs, eurostat, fred, bis, worldbank, imf, owid, energycharts, rijksfinancien, ustreasury, usaspending, eponline, cbscw, cwintl, elections, parties, wikipolls, eurobarometer, whr, gtrends, gdelt, history, normalise-cbs)`
+				`Unknown source "${source}" (cbs, eurostat, fred, bis, oecd, statcan, worldbank, imf, owid, energycharts, rijksfinancien, ustreasury, usaspending, eponline, cbscw, cwintl, elections, parties, wikipolls, eurobarometer, whr, gtrends, gdelt, history, normalise-cbs)`
 			);
 	}
 } finally {