fix(database): point @repo /database/seed export to compiled dist

exports["./seed"] was pointing to src/seed.ts (raw TypeScript) which
Node cannot parse in production → SyntaxError: Unexpected token ':'.
Changed to dist/src/seed.js which is already compiled by tsc (src/**/*
is in tsconfig include). Also reverted root seed.ts to pure script —
the re-export we added was unused since exports now points to dist/.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/database/package.json

@@ -5,7 +5,7 @@
     "types": "./dist/index.d.ts",
     "exports": {
         ".": "./dist/index.js",
-        "./seed": "./src/seed.ts"
+        "./seed": "./dist/src/seed.js"
     },
     "scripts": {
         "build": "prisma generate && tsc --build",

packages/database/seed.ts

@@ -1,5 +1,3 @@
-export { seedDatabase } from './src/seed';
-
 /**
  * Seed Script — Module 1 : Eco-Moto Business
  * Inserts a realistic Track + 3 TrackDays for testing.