docs: warn that re-seeding reverts admin-panel edits

scripts/seed.ts

@@ -5,6 +5,9 @@ import { createClient } from '@supabase/supabase-js'
 // `src/data/products.ts` and `src/data/services.ts` now fetch live rows from Supabase
 // (see Tasks 2-3 of this plan) instead of exporting static arrays, so this seed script
 // owns its own copy of the seed data below rather than importing it from application code.
+// WARNING: re-running this after admin-panel edits will revert those rows to these seed
+// defaults (unconditional upsert keyed on id). Intended for initial setup / disaster
+// recovery only, not routine use.
 interface SeedProduct {
   id: string
   name: string