-- Add size constraint to prevent JSON blob storage in content_submissions
-- This enforces the architectural rule: "NEVER STORE JSON IN SQL COLUMNS"
-- Content should only contain: action + max 2 reference IDs (< 500 bytes)

ALTER TABLE public.content_submissions 
ADD CONSTRAINT content_size_check 
CHECK (pg_column_size(content) < 500);

COMMENT ON CONSTRAINT content_size_check ON public.content_submissions 
IS 'Prevents large JSON blobs in content column. Content should only contain action and reference IDs. All actual data goes in submission_items.item_data or specialized relational tables.';