docs(resources): note local directory uploads skip symlink entries (#2374)

[r266-tech]

#2374 (skip symlinks in directory uploads) changed what add_resource / add_skill ingest from a local directory, but the Additional Notes ingestion-contract list in docs/{en,zh}/api/02-resources.md only documents the .gitignore / ignore_dirs / include / exclude filters — not the new symlink skipping.

Adds one parallel EN+ZH bullet: symlink entries (file & directory) are skipped, real files are still ingested via their actual path, and an all-symlink directory yields an empty (warned) archive — grounded in openviking_cli/client/http.py _zip_directory.

[github-actions]

PR Reviewer Guide 🔍

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🎫 Ticket compliance analysis 🔶 2374 - Partially compliant Compliant requirements: Update documentation to note symlink skipping behavior (both English and Chinese) Non-compliant requirements: Skip symlinks in directory uploads (code change) Keep archives bounded to real files (code change) Warn on empty archive (code change) Add regression coverage (tests)

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪

🏅 Score: 100

🧪 No relevant tests

🔒 No security concerns identified

✅ No TODO sections

🔀 No multiple PR themes

⚡ No major issues detected

[github-actions]

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[qin-ctx]

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