Local dev stack improvements

- Extend docker-compose.dev.yml with optional monitoring profile
  (Prometheus, Grafana, Loki) via --profile monitoring
- Align dev PostgreSQL with production: pg_stat_statements + init scripts
- Add scripts/seed.ts with idempotent Berlin test data (user, route, activity)
- Add pnpm db:seed and pnpm dev:reset scripts
- Simplify CI e2e job: replace manual docker run + BRouter setup with
  docker compose up --wait; add db:seed step
- Improve scripts/dev.sh: Docker check, --wait health checks, --monitoring
  flag, seed step
- Add scripts/reset-dev.sh to wipe and restart the local stack
- Add .env.development.example with documented local defaults

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

package.json

@@ -20,8 +20,10 @@
     "db:push": "drizzle-kit push --config packages/db/drizzle.config.ts --force",
     "db:migrate-data": "tsx packages/db/src/migrate-data.ts",
     "db:studio": "drizzle-kit studio --config packages/db/drizzle.config.ts",
+    "db:seed": "node --experimental-strip-types scripts/seed.ts",
     "dev:services": "docker compose -f docker-compose.dev.yml up -d",
     "dev:full": "./scripts/dev.sh",
+    "dev:reset": "./scripts/reset-dev.sh",
     "dev:ios": "pnpm --filter @trails-cool/mobile ios",
     "dev:android": "pnpm --filter @trails-cool/mobile android",
     "openspec": "openspec"