Honor cancellation at standard inspection boundaries

docs/roadmap/remediation.md

@@ -51,6 +51,9 @@ architecture. The issues below affect behavior within the implemented structure.
 - R-02 complete: inline document starts are recognized and native content is
   retained, including block scalars.
 
+- R-03 complete: standard inspection handlers check cancellation before runtime
+  construction/acquisition, after acquisition, and before prepared report delivery.
+
 ## Findings and priority
 
 P1 means a supported invocation is blocked or its report content is corrupted.