fix(transit): real route-id modes for Prague, Bordeaux and Rouen; dated Warsaw/Poznań credits; data.gov.my refresh

- Prague PID: map route-id ranges from PID's GTFS (metro L991-993, S/R trains
  L1000s/L1100s, P ferries L1800s, trolleybuses 50-59, X lines, funicular LD)
  instead of 'below 100 is a tram, rest bus'.
- Bordeaux TBM: trams ride numbered ids 59-62/163/164 (A-F), boats 951-953;
  the old letter match never fired.
- Rouen Astuce: TCAR:90 Metro as tram, TCAR:99 Calypso as ferry; Le Havre FUNI.
- Warsaw and Poznan: credit carries the data date (and Warsaw links its API),
  as their terms require.
- data.gov.my feeds: CC BY 4.0, refreshMs 30 s to stay under 4 requests/min;
  proxy honours per-feed refreshMs.
- Denver: quote the RTD agreement; tests use the feeds' real route ids.

src/data/dataCredits.js

@@ -660,20 +660,40 @@ export const OSM_PLACES_CREDIT = {
 /**
  * Per-feed transit credit, registered the first time that feed's vehicles
  * render (see `src/data/transitFeeds.js` for the license of each).
- * @param {{ id: string, attribution: string, license: string, licenseUrl: string }} feed
+ *
+ * Two optional registry fields serve licences that ask for more than a name:
+ * `sourceUrl` links the attribution to the publisher (Warsaw asks for a link
+ * to its API), and `creditDated` adds the UTC date of the data, from the feed
+ * header or else the fetch time (Warsaw and Poznań ask for the download or
+ * update date). A dated credit is keyed by its date, so a new day registers a
+ * new line instead of keeping yesterday's.
+ * @param {{ id: string, attribution: string, license: string, licenseUrl: string,
+ *   sourceUrl?: string, creditDated?: boolean }} feed
+ * @param {{ feedTimestamp?: number|null, fetchedAt?: number|null }} [snapshot]
+ *   `feedTimestamp` in epoch seconds, `fetchedAt` in epoch ms.
  * @returns {{ key: string, html: string }}
  */
-export function transitFeedCredit(feed) {
+export function transitFeedCredit(feed, snapshot = null) {
   const escape = (text) =>
     String(text)
       .replaceAll('&', '&')
       .replaceAll('<', '&lt;')
       .replaceAll('>', '&gt;')
       .replaceAll('"', '&quot;');
+  const source = feed.sourceUrl
+    ? `<a href="${escape(feed.sourceUrl)}" target="_blank" rel="noopener">${escape(feed.attribution)}</a>`
+    : escape(feed.attribution);
+  const dataMs = Number.isFinite(snapshot?.feedTimestamp)
+    ? snapshot.feedTimestamp * 1000
+    : snapshot?.fetchedAt;
+  const date =
+    feed.creditDated === true && Number.isFinite(dataMs) && dataMs > 0
+      ? new Date(dataMs).toISOString().slice(0, 10)
+      : null;
   return {
-    key: `transit-${feed.id}`,
+    key: date ? `transit-${feed.id}-${date}` : `transit-${feed.id}`,
     html:
-      `Transit (${escape(feed.attribution)}): ` +
+      `Transit (${source}${date ? `, data of ${date}` : ''}): ` +
       `<a href="${escape(feed.licenseUrl)}" target="_blank" rel="noopener">${escape(feed.license)}</a>`,
   };
 }