Harden document parsing security defaults #4560

Job	Run time
AOT/Trim analyzers	3m 51s
Cross-platform build (ubuntu-latest)	3m 29s
Ubuntu net10.0	11m 40s
Cross-platform build (windows-latest)	6m 53s
Ubuntu net8.0	18m 32s
Windows	7m 30s
macOS platform smoke (net8.0)	3m 57s
macOS	2s
Ubuntu	4s
	55m 58s

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