Expose opt-in HTTP execution reports

docs/operations.md

@@ -31,6 +31,11 @@ contain sensitive identifiers even though they omit prompt and response bodies.
 Keep report paths separate from generated output and apply the same access and
 retention controls. Output and report writes are not transactional; an older
 report may remain when no terminal observation was produced.
+HTTP callers may also request a [terminal execution report](api.md#execution-report).
+It shares the same identifier sensitivity and should receive response access
+and retention controls. An opted-in report increases the encoded response size;
+an oversized success or report-bearing error becomes the compact 413 response
+without a report.
 
 ## Deploy The Filesystem And Process