first working demo

drizzle/0005_redesign_ratings.sql

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+-- Redesign ratings table for single JSON timeseries entry with soft deletes
+DROP TABLE IF EXISTS rating_new;
+CREATE TABLE rating_new (
+  id TEXT PRIMARY KEY,
+  participant_id TEXT NOT NULL REFERENCES participant(id),
+  audio_file_id TEXT NOT NULL REFERENCES audio_file(id),
+  final_value REAL NOT NULL,
+  timeseries_data TEXT NOT NULL,
+  created_at INTEGER NOT NULL,
+  deleted_at INTEGER DEFAULT NULL
+);
+
+-- Copy existing data if any (transform to new format)
+INSERT INTO rating_new (id, participant_id, audio_file_id, final_value, timeseries_data, created_at, deleted_at)
+SELECT 
+  id, 
+  participant_id, 
+  audio_file_id, 
+  value as final_value, 
+  '[{"timestamp":' || timestamp || ',"value":' || value || ',"time":' || (created_at * 1000) || '}]' as timeseries_data,
+  created_at,
+  CASE WHEN is_completed = 1 THEN NULL ELSE strftime('%s', 'now') * 1000 END as deleted_at
+FROM rating 
+WHERE is_completed = 1;  -- Only keep completed ratings, mark others as deleted
+
+-- Drop old table and rename
+DROP TABLE rating;
+ALTER TABLE rating_new RENAME TO rating;
+
+-- Create unique index for active ratings only
+CREATE UNIQUE INDEX participant_audio_active ON rating (participant_id, audio_file_id) WHERE deleted_at IS NULL;