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>

Dockerfile

@@ -44,8 +44,13 @@ COPY --from=deps --chown=nextjs:nodejs /app/node_modules ./node_modules
 RUN npx playwright install --with-deps chromium && \
     chown -R nextjs:nodejs /app/.playwright
 
-# SQLite data directory — mount a named volume here for persistence
+# Seed data directory with park-meta.json (RCDB coaster lists + rcdb_id mappings).
+# Must be copied before VOLUME so Docker initialises a fresh named volume with
+# this file already present. Existing volumes retain their own copy.
 RUN mkdir -p /app/data && chown nextjs:nodejs /app/data
+COPY --from=builder --chown=nextjs:nodejs /app/data/park-meta.json ./data/park-meta.json
+
+# SQLite database lives here — mount a named volume for persistence
 VOLUME ["/app/data"]
 
 USER nextjs