Extract API, migrations and portable NAS deployment

database/migrations/009_delivery_timing.sql

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+ALTER TABLE deliveries ADD COLUMN IF NOT EXISTS delivery_slot VARCHAR(20) NULL AFTER scheduled_date;
+ALTER TABLE deliveries ADD COLUMN IF NOT EXISTS specific_time CHAR(5) NULL AFTER delivery_slot;
+ALTER TABLE deliveries ADD COLUMN IF NOT EXISTS delivery_window_start CHAR(5) NULL AFTER specific_time;
+ALTER TABLE deliveries ADD COLUMN IF NOT EXISTS delivery_window_end CHAR(5) NULL AFTER delivery_window_start;