Remove stale duplicate routes and fix ordering in seed data
The DB accumulated stale routes from previous imports with different naming (e.g. "Route 1" alongside "Alola Route 1"). These were exported back to JSON, causing duplicate entries with conflicting order values. Removed 597 stale routes across 17 game files and re-sorted all 22 game files to match the canonical progression in route_order.json. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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