LingYi 1c3b20b1bf
fix(channels): preserve inbound files on concurrent uploads (#6476)
* fix(channels): preserve inbound files on concurrent uploads

Claim IM attachment destinations exclusively and retry filename collisions.
Preserve default replacement behavior and Gateway conversion-link compatibility.

* fix(channels): claim embedded upload destinations exclusively

Retry competing publications in Feishu and DingTalk without replacing their bytes.
Cover mounted and remote sandbox paths, and keep returned filenames consistent.

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Signed-off-by: LingYi <lingyi01525@gmail.com>
Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
2026-10-09 20:56:26 +08:00
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