feat: automated nightly scraper + housekeeping

Scraper automation (docker-compose):
- Add scraper service to docker-compose.yml using the same image and
  shared park_data volume; overrides CMD to run scrape-schedule.sh
- scripts/scrape-schedule.sh: runs an initial scrape on container start,
  then sleeps until 3:00 AM (respects TZ env var) and repeats nightly;
  logs timestamps and next-run countdown; non-fatal on scrape errors

Staleness window: 7 days → 72 hours in lib/db.ts so data refreshes
more frequently with the automated schedule in place

Remove favicon: delete app/icon.tsx and public/logo.svg

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

public/logo.svg

@@ -1,19 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 56" fill="none">
-  <!-- Lift hill + ground + camelback -->
-  <path
-    d="M 2 52 L 20 6 L 38 52 L 116 52 Q 134 22 152 52 L 196 52"
-    stroke="#f59e0b"
-    stroke-width="3.5"
-    stroke-linecap="round"
-    stroke-linejoin="round"
-  />
-  <!-- Vertical loop -->
-  <circle
-    cx="75"
-    cy="33"
-    r="19"
-    stroke="#f59e0b"
-    stroke-width="3.5"
-    fill="none"
-  />
-</svg>