Remove one-time DB reset step from deploy workflow

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/deploy.yml

@@ -24,10 +24,6 @@ jobs:
           ENVEOF
           sed -i 's/^[[:space:]]*//' .env.prod
 
-      - name: Reset database (one-time schema migration)
-        run: |
-          docker compose -f docker-compose.prod.yml --env-file .env.prod down -v || true
-
       - name: Build and deploy
         run: |
           docker compose -f docker-compose.prod.yml --env-file .env.prod build