Refactor: Remove unused JSON columns

supabase/migrations/20251003141223_6b17aac9-811a-486e-9228-000d95a63480.sql

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+-- ═══════════════════════════════════════════════════════════════════
+-- MIGRATION: Remove JSON Columns from Rides and Ride Models
+-- ═══════════════════════════════════════════════════════════════════
+-- 
+-- This migration enforces the "NEVER STORE JSON IN SQL COLUMNS" rule
+-- by removing deprecated JSON columns that have been replaced with
+-- proper relational tables:
+--
+-- rides.former_names → ride_name_history table
+-- rides.coaster_stats → ride_coaster_statistics table  
+-- rides.technical_specs → ride_technical_specifications table
+-- ride_models.technical_specs → ride_model_technical_specifications table
+--
+-- ═══════════════════════════════════════════════════════════════════
+
+-- Drop deprecated JSON columns from rides table
+ALTER TABLE rides 
+  DROP COLUMN IF EXISTS former_names,
+  DROP COLUMN IF EXISTS coaster_stats,
+  DROP COLUMN IF EXISTS technical_specs;
+
+-- Drop deprecated JSON column from ride_models table
+ALTER TABLE ride_models 
+  DROP COLUMN IF EXISTS technical_specs;
+
+-- Add comments to document the relational approach
+COMMENT ON TABLE ride_name_history IS 'Stores historical names for rides - replaces rides.former_names JSON column';
+COMMENT ON TABLE ride_coaster_statistics IS 'Stores coaster statistics for rides - replaces rides.coaster_stats JSON column';
+COMMENT ON TABLE ride_technical_specifications IS 'Stores technical specifications for rides - replaces rides.technical_specs JSON column';
+COMMENT ON TABLE ride_model_technical_specifications IS 'Stores technical specifications for ride models - replaces ride_models.technical_specs JSON column';