feat(seed): synthetic fixture covering every pipeline stage + db:reset

Splits seed bootstrap (ports/roles/profile) into a shared module so
two seed entry points can share it:
- pnpm db:seed             realistic NocoDB-shaped fixture (existing)
- pnpm db:seed:synthetic   12 clients, one per pipeline stage + archive
                           variants (rich metadata for restore wizard)

scripts/db-reset.ts truncates all data tables (preserves migrations);
guarded by --confirm and a localhost host check. Companion npm scripts:
- pnpm db:reset
- pnpm db:reseed:realistic
- pnpm db:reseed:synthetic

scripts/dev-open-browser.ts launches a headed Chromium with no viewport
override (uses the host monitor's natural size), pre-fills the login
form for the requested role.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

package.json

@@ -15,6 +15,11 @@
     "db:push": "drizzle-kit push",
     "db:studio": "drizzle-kit studio",
     "db:seed": "tsx src/lib/db/seed.ts",
+    "db:seed:realistic": "tsx src/lib/db/seed.ts",
+    "db:seed:synthetic": "tsx src/lib/db/seed-synthetic.ts",
+    "db:reset": "tsx scripts/db-reset.ts --confirm",
+    "db:reseed:realistic": "pnpm db:reset && pnpm db:seed:realistic",
+    "db:reseed:synthetic": "pnpm db:reset && pnpm db:seed:synthetic",
     "test:e2e": "playwright test",
     "test:e2e:smoke": "playwright test --project=smoke",
     "test:e2e:exhaustive": "playwright test --project=exhaustive",