Update gradio frontend to allow interactive function in the UI

Updated the space so that it can maintian a consistent data between updates and they are persisted

Updating to adress the bottleneck in the poll for next roun

Fix aggregator client url

normalizing the url so that it does not get mismatched

update the configuration so we can see dashboard visualization

feat(aggregator): optional ADMIN_SECRET and STATUS_READ_SECRET

test: guard rate-bucket reset; chore: add .dockerignore

feat(aggregator): validate /submit payload and round_num

feat(aggregator): rate limit POST /submit per client

feat(aggregator): add GET /health liveness probe