eval_job: pass submission-zip download URL to the report

eval_job: upload interface overlay + link GT/input in hosted report

eval_job: warm the render CDN after upload

eval_job: upload renders to the public bucket; report references them by URL

Publish all per-fixture renders (PNG views + rotating.webp)

sync eval shards to bucket via API (no mount)

stage eval shards through mounted bucket

eval_job: publish report + gallery in one commit

eval_job: add shard mode (--fixtures/--shard-id) for sharded submission eval

upload per-fixture iso render for the leaderboard gallery

initial commit: Dockerfile + eval_job.py + README