* fix(infoquest): reject invalid extracted fetch content
* fix(infoquest): address fetch response review feedback
Preserve reader_result precedence so malformed primary content is reported instead of silently masked by a secondary field. Include request URLs in invalid/empty content diagnostics and reject non-object JSON before field selection.
* test(infoquest): respect URL redaction in fetch diagnostics
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Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
