feat(04-01): create seed-forms script and npm run seed:forms command

- Create scripts/seed-forms.ts: reads seeds/forms/, upserts PDFs into form_templates via onConflictDoUpdate on filename
- Add seed:forms script to package.json with DOTENV_CONFIG_PATH=.env.local prefix
- Empty seeds/forms/ prints guidance message and exits 0 (monthly-sync workflow ready)

teressa-copeland-homes/package.json

@@ -10,6 +10,7 @@
     "db:generate": "drizzle-kit generate",
     "db:migrate": "drizzle-kit migrate",
     "db:seed": "tsx scripts/seed.ts",
+    "seed:forms": "DOTENV_CONFIG_PATH=.env.local npx tsx scripts/seed-forms.ts",
     "db:studio": "drizzle-kit studio"
   },
   "dependencies": {