feat: RCDB-backed roller coaster filter with fuzzy name matching

- Add lib/park-meta.ts to manage data/park-meta.json (rcdb_id + coaster lists)
- Add lib/scrapers/rcdb.ts to scrape operating coaster names from RCDB park pages
- discover.ts now seeds park-meta.json with skeleton entries for all parks
- scrape.ts now refreshes RCDB coaster lists (30-day staleness) for parks with rcdb_id set
- fetchLiveRides() accepts a coasterNames Set; isCoaster uses normalize() on both sides
  to handle trademark symbols, 'THE ' prefixes, and punctuation differences between
  Queue-Times and RCDB names — applies correctly to both land rides and top-level rides
- Commit park-meta.json so it ships in the Docker image (fresh volumes get it automatically)
- Update .gitignore / .dockerignore to exclude only *.db files, not all of data/
- Dockerfile copies park-meta.json into image before VOLUME declaration
- README: document coaster filter setup and correct staleness window (72h not 7d)

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

lib/park-meta.ts

@@ -0,0 +1,86 @@
+/**
+ * park-meta.json — persisted alongside the SQLite DB in data/
+ *
+ * This file stores per-park metadata that doesn't belong in the schedule DB:
+ *   - rcdb_id: user-supplied RCDB park ID (fills into https://rcdb.com/{id}.htm)
+ *   - coasters: list of operating roller coaster names scraped from RCDB
+ *   - coasters_scraped_at: ISO timestamp of last RCDB scrape
+ *
+ * discover.ts: ensures every park has a skeleton entry (rcdb_id null by default)
+ * scrape.ts:   populates coasters[] for parks with a known rcdb_id (30-day staleness)
+ */
+
+import fs from "fs";
+import path from "path";
+
+const META_PATH = path.join(process.cwd(), "data", "park-meta.json");
+
+export interface ParkMeta {
+  /** RCDB park page ID — user fills this in manually after discover creates the skeleton */
+  rcdb_id: number | null;
+  /** Operating roller coaster names scraped from RCDB */
+  coasters: string[];
+  /** ISO timestamp of when coasters was last scraped from RCDB */
+  coasters_scraped_at: string | null;
+}
+
+export type ParkMetaMap = Record<string, ParkMeta>;
+
+export function readParkMeta(): ParkMetaMap {
+  try {
+    return JSON.parse(fs.readFileSync(META_PATH, "utf8")) as ParkMetaMap;
+  } catch {
+    return {};
+  }
+}
+
+export function writeParkMeta(meta: ParkMetaMap): void {
+  fs.mkdirSync(path.dirname(META_PATH), { recursive: true });
+  fs.writeFileSync(META_PATH, JSON.stringify(meta, null, 2) + "\n");
+}
+
+/** Default skeleton entry for a park that has never been configured. */
+export function defaultParkMeta(): ParkMeta {
+  return { rcdb_id: null, coasters: [], coasters_scraped_at: null };
+}
+
+const COASTER_STALE_MS = 30 * 24 * 60 * 60 * 1000; // 30 days
+
+/** Returns true when the coaster list needs to be re-scraped from RCDB. */
+export function areCoastersStale(entry: ParkMeta): boolean {
+  if (!entry.coasters_scraped_at) return true;
+  return Date.now() - new Date(entry.coasters_scraped_at).getTime() > COASTER_STALE_MS;
+}
+
+/**
+ * Normalize a ride name for fuzzy matching between data sources.
+ *
+ * Queue-Times uses branded names (BATMAN™ The Ride, THE JOKER™ Funhouse Coaster)
+ * while RCDB uses clean names (Batman The Ride, Joker Funhouse Coaster).
+ *
+ * Normalization steps:
+ *   1. Strip trademark/copyright symbols (™ ® ©)
+ *   2. Strip leading "THE " / "THE" prefix
+ *   3. Replace punctuation (- : ' ") with spaces
+ *   4. Collapse runs of whitespace
+ *   5. Lowercase and trim
+ */
+export function normalizeRideName(name: string): string {
+  return name
+    .replace(/[™®©]/g, "")
+    .replace(/^the\s+/i, "")
+    .replace(/[-:'".]/g, " ")
+    .replace(/\s+/g, " ")
+    .toLowerCase()
+    .trim();
+}
+
+/**
+ * Returns a Set of normalized coaster names for fast membership checks.
+ * Returns null when no coaster data exists for the park.
+ */
+export function getCoasterSet(parkId: string, meta: ParkMetaMap): Set<string> | null {
+  const entry = meta[parkId];
+  if (!entry || entry.coasters.length === 0) return null;
+  return new Set(entry.coasters.map(normalizeRideName));
+}