fix: recover eligible model GPU routes

modelhub_submmit_api/README.md

@@ -115,14 +115,19 @@ bash run_poll.sh --dry-run
 - Strategy state is stored in `.modelhub_state/gpu_strategy.json`; a generation never recalculates
   during candidate submission.
 - Candidate discovery starts with the configured recent window, then automatically expands to
-  7 days, 30 days, and older history (up to 3,000 models) when the recent pool is exhausted.
+  7 days, 30 days, and the first 3,000 raw ModelScope rows ordered by update time. If the
+  candidate pool is still short, it rotates through up to 200 download-ranked rows per cycle
+  as an older-model fallback.
 - Model verification responses are cached across poll cycles for 15 minutes. Local model/GPU
   failures cool down after 24 hours instead of remaining permanently blocked.
 - Community deduplication is model/GPU-specific: another GPU's adaptation does not block the
-  current GPU. Every actual submission performs a fresh uncached check for its exact GPU.
+  current GPU. `未验证` with no records is eligible. `验证失败` is eligible only with a
+  different publicly vetted framework after all recorded attempts explicitly failed;
+  `已验证`, `验证中`, and ambiguous records remain blocked. Every actual submission
+  performs a fresh uncached check for its exact GPU and framework.
 - If the community lookup is unavailable, submission is deferred. A platform model-uniqueness
   rejection permanently excludes only that model/GPU combination from future local retries.
-- Each model can be submitted at most once per GPU.
+- The same framework is not retried for a model/GPU after a recorded failure.
 - Multiple ModelHub tokens are pooled and used to route submissions to the account with available async capacity.
 - Concurrent submissions reserve account slots locally, and an account-capacity race automatically falls through to another account.
 - Concurrent local processes claim model/GPU pairs in `.modelhub_state/submission_claims.jsonl`; shared ledger, history, and outcome files use process locks and atomic replacement.