[Code scan] Make dpdisp-submit skill commands honor --allow-ref

[njzjz]

Found by a Codex global repository scan of deepmodeling/dpdispatcher at commit 98a9e08.

Problem
The dpdisp-submit skill says $ref configs require --allow-ref, but the mandatory validation and submission command chain omits that flag.

Relevant code

dpdispatcher/skills/dpdisp-submit/SKILL.md

Lines 77 to 87 in 98a9e08

	### Validate & Submit
	You **MUST** strictly execute the following command chain in sequence.
	**Note**: If the `$ref` syntax is used in the configuration, you must pass the `--allow-ref` flag to all validation and submission commands, otherwise parsing or validation will fail even if the JSON content is correct.
	```bash
	# Logic and Schema Validation
	uvx --with dpdispatcher dargs check -f dpdispatcher.entrypoints.submit.submission_args submission.json
	# Submit Job
	uvx --from dpdispatcher dpdisp submit submission.json
	```

Impact
Agents or users following the skill exactly will reject valid $ref-based submission configs during validation or submission, despite the note immediately above the commands.

Suggested fix
Include --allow-ref in the command chain when $ref is used, or show separate command chains for referenced and non-referenced configs.