Add served_model_name mismatch to NEL CI common issues

When using NEL_DEPLOYMENT_COMMAND with a custom --served-model-name,
deployment.served_model_name must also be overridden via
NEL_OTHER_OVERRIDES — NEL uses the config field (not the actual serve
command) to set the eval client's model_id. Without this, the client
sends the checkpoint path as model_id, causing 404 errors.

Signed-off-by: Zhiyu Cheng <zhiyuc@nvidia.com>

Author: Edwardf0t1

.claude/skills/evaluation/references/nel-ci-guide.md

@@ -255,6 +255,7 @@ evaluation:
 | `trusted_eval` type mismatch in MLflow export | NEL writes boolean `true` instead of string `"true"` | Fix with `sed -i "s/trusted_eval: true/trusted_eval: 'true'/"` in export config |
 | `LexerNoViableAltException` in Hydra | `NEL_DEPLOYMENT_COMMAND` contains quotes, `&&`, `$()` | Use wrapper script pattern (section 4): put script in checkpoint dir, set command to `bash /checkpoint/serve.sh` |
 | `Bad Request` from GitLab API trigger | Shell escaping mangled the JSON payload | Use Python to construct JSON (section 4) instead of bash heredocs/string interpolation |
+| `The model <path> does not exist` (404) | Eval client uses checkpoint path as model_id instead of served_model_name | Add `deployment.served_model_name=<name>` to `NEL_OTHER_OVERRIDES` to match `--served-model-name` in your serve command |
 
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