fix(native): require observed symbol origin for named identity

docs/native-investigation.md

@@ -1038,3 +1038,10 @@ numeric address still selects its containing procedure. Use
 `resolve_containing_procedure` to request containment directly. IDA and Hopper
 reject reserved `file-offset:` selectors before name lookup; source-file offset
 selection belongs to the Ghidra import mapping.
+
+Native function names carry observed symbol metadata where available. Ghidra uses
+its function symbol's source and dynamic flags; Hopper and IDA leave origin
+unknown because this adapter has no verified origin API. Comparison and matching
+cannot use unknown labels as cross-artifact identity, even when their spelling
+looks meaningful. Original labels remain in Evidence. This qualification does not
+change address equality in a known common native coordinate context.