refactor: hardcode API IDs and coaster lists, remove Playwright discovery

Embed Six Flags API IDs directly in the park registry and snapshot
coaster lists from park-meta.json into a TypeScript module. This
eliminates the Playwright-based discovery script, RCDB scraper, and
runtime dependency on park-meta.json — preparing for the backend
API transition.

- Add apiId field to Park type and all 24 park entries
- Create lib/coaster-data.ts with hardcoded coaster lists
- Update page components to use park.apiId and new getCoasterSet()
- Remove scripts/discover.ts, lib/scrapers/rcdb.ts, lib/park-meta.ts
- Remove data/park-meta.json from shared volume
- Remove playwright devDependency and discover npm script
- Simplify scripts/scrape.ts (no RCDB, no discovery checks)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/page.tsx

@@ -1,11 +1,11 @@
 import { HomePageClient } from "@/components/HomePageClient";
 import { PARKS } from "@/lib/parks";
-import { openDb, getDateRange, getApiId } from "@/lib/db";
+import { openDb, getDateRange } from "@/lib/db";
 import { getTodayLocal, isWithinOperatingWindow, getOperatingStatus } from "@/lib/env";
 import { fetchLiveRides } from "@/lib/scrapers/queuetimes";
 import { fetchToday } from "@/lib/scrapers/sixflags";
 import { QUEUE_TIMES_IDS } from "@/lib/queue-times-map";
-import { readParkMeta, getCoasterSet } from "@/lib/park-meta";
+import { getCoasterSet, hasCoasterData } from "@/lib/coaster-data";
 import type { DayData } from "@/lib/db";
 
 interface PageProps {
@@ -58,9 +58,7 @@ export default async function HomePage({ searchParams }: PageProps) {
   if (weekDates.includes(today)) {
     const todayResults = await Promise.all(
       PARKS.map(async (p) => {
-        const apiId = getApiId(db, p.id);
-        if (!apiId) return null;
-        const live = await fetchToday(apiId, 300); // 5-min ISR cache
+        const live = await fetchToday(p.apiId, 300); // 5-min ISR cache
         return live ? { parkId: p.id, live } : null;
       })
     );
@@ -83,9 +81,7 @@ export default async function HomePage({ searchParams }: PageProps) {
     0
   );
 
-  // Always fetch both ride and coaster counts — the client decides which to display.
-  const parkMeta = readParkMeta();
-  const hasCoasterData = PARKS.some((p) => (parkMeta[p.id]?.coasters.length ?? 0) > 0);
+  const coasterDataAvailable = hasCoasterData();
 
   let rideCounts: Record<string, number> = {};
   let coasterCounts: Record<string, number> = {};
@@ -112,7 +108,7 @@ export default async function HomePage({ searchParams }: PageProps) {
     const trackedParks = openTodayParks.filter((p) => QUEUE_TIMES_IDS[p.id]);
     const results = await Promise.all(
       trackedParks.map(async (p) => {
-        const coasterSet = getCoasterSet(p.id, parkMeta);
+        const coasterSet = getCoasterSet(p.id);
         const result = await fetchLiveRides(QUEUE_TIMES_IDS[p.id], coasterSet, 300);
         const rideCount = result ? result.rides.filter((r) => r.isOpen).length : null;
         const coasterCount = result ? result.rides.filter((r) => r.isOpen && r.isCoaster).length : 0;
@@ -143,7 +139,7 @@ export default async function HomePage({ searchParams }: PageProps) {
       openParkIds={openParkIds}
       closingParkIds={closingParkIds}
       weatherDelayParkIds={weatherDelayParkIds}
-      hasCoasterData={hasCoasterData}
+      hasCoasterData={coasterDataAvailable}
       scrapedCount={scrapedCount}
     />
   );