feat: add per-ride history charts with wait time and uptime tracking

Adds a cron-driven sampler that snapshots Queue-Times waits and Six Flags
Fast Lane data every 5 minutes into a new ride_wait_samples table, and a
clickable per-ride detail page at /park/[id]/ride/[slug] with Today / 7d /
30d Recharts views plus a 30d uptime pill. Rides are keyed by Queue-Times'
stable qt_ride_id so renames don't fragment history. Samples store
pre-bucketed local_date and local_time in the park's IANA timezone so
aggregations are pure SQL and DST-safe.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/src/index.ts

@@ -9,6 +9,7 @@ import { startScheduler } from "./services/scheduler";
 import calendarRoutes from "./routes/calendar";
 import parksRoutes from "./routes/parks";
 import ridesRoutes from "./routes/rides";
+import rideHistoryRoutes from "./routes/ride-history";
 import statusRoutes from "./routes/status";
 import scrapeRoutes from "./routes/scrape";
 
@@ -22,6 +23,7 @@ app.use("*", cors());
 app.route("/api/calendar", calendarRoutes);
 app.route("/api/parks", parksRoutes);
 app.route("/api/parks", ridesRoutes);
+app.route("/api/parks", rideHistoryRoutes);
 app.route("/api/status", statusRoutes);
 app.route("/api/scrape", scrapeRoutes);