submit: derive eval-gpu image repo from HF_ORG

the image lives in the org, so the repo id tracks HF_ORG (matching
leaderboard.py) and an org rename stays one space-variable change.
on the space HF_ORG is set, so this resolves to the same value as
before. the job namespace stays a fixed michaelr27 constant since
dispatch is billed to that account. verified resolution for the
space, override, and no-HF_ORG cases.

submit.py

@@ -20,8 +20,8 @@ poll of an HF Jobs GPU eval + boot-time stuck-pending sweep. The
 handler validates the upload, uploads the zip to
 ``submissions/<id>.zip``, appends a ``status: pending`` row to
 ``results.jsonl`` (under a process-wide lock), spawns a daemon thread
-that dispatches a per-submission HF Job against the
-``HuggingAI4Engineering/cadgenbench-eval-gpu`` image and polls
+that dispatches a per-submission HF Job against the eval-gpu
+Docker Space image and polls
 ``inspect_job`` until the job's stage is terminal. On COMPLETED the
 worker downloads ``reports/<id>.json`` (the Job already uploaded
 ``reports/<id>.{html,json}`` to the submissions dataset), reads
@@ -111,7 +111,7 @@ from huggingface_hub import (
 )
 from huggingface_hub.errors import EntryNotFoundError
 
-from leaderboard import HF_DATA_REPO, HF_SUBMISSIONS_REPO
+from leaderboard import HF_DATA_REPO, HF_ORG, HF_SUBMISSIONS_REPO
 
 logger = logging.getLogger(__name__)
 
@@ -135,12 +135,16 @@ SUBMITTED_AT_FORMAT = "%Y-%m-%dT%H:%M:%SZ"
 STUCK_PENDING_REASON = "evaluation interrupted by Space restart"
 BOOT_SWEEP_ENV = "CADGENBENCH_DISABLE_BOOT_SWEEP"
 
-# HF Jobs target. The eval-gpu image is hosted as a Docker Space
-# (paused; image-only) at HuggingAI4Engineering/cadgenbench-eval-gpu.
-# Jobs run under the personal `michaelr27` namespace (no-bill for
-# HF employees per Round 6 of space-setup/leandro.md). a10g-large
-# fits cadgenbench evaluate --workers 8 comfortably in 46 GB RAM.
-EVAL_GPU_SPACE = "HuggingAI4Engineering/cadgenbench-eval-gpu"
+# HF Jobs target. The eval-gpu image is a Docker Space (paused;
+# image-only) that lives in the org, so its repo id is derived from
+# HF_ORG and an org rename stays a single Space-variable change.
+# The job NAMESPACE is the account dispatch is billed to and must
+# stay `michaelr27` (no-bill for HF employees per Round 6 of
+# space-setup/leandro.md); it is a fixed constant, never env-driven.
+# a10g-large fits cadgenbench evaluate --workers 8 in 46 GB RAM.
+EVAL_GPU_SPACE = os.getenv(
+    "CADGENBENCH_EVAL_GPU_SPACE", f"{HF_ORG}/cadgenbench-eval-gpu"
+)
 EVAL_JOB_FLAVOR = "a10g-large"
 EVAL_JOB_NAMESPACE = "michaelr27"
 EVAL_JOB_TIMEOUT = "30m"