yushen c27b7bab5e fix(upload): sniff content type, sanitize filename, add key prefix ... - Use http.DetectContentType() instead of trusting client-declared MIME type - Sanitize quotes in filename for Content-Disposition header injection - Add uploads/ prefix to S3 keys for better organization Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>		2026-03-31 14:58:52 +08:00
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s3.go	fix(upload): sniff content type, sanitize filename, add key prefix	2026-03-31 14:58:52 +08:00