clean up decision debug prints, add --with-refs to show

Remove debug print statements. Pass --with-refs to pql decisions show
so cross-references render in the detail view.

The decision body text is not available from pql — it indexes metadata
only. The body section of the D-record lives in the markdown file.
Rendering it requires either a pql --with-context flag or direct file
read + section extraction.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/src/pql/client.dart

@@ -103,7 +103,7 @@ class PqlClient {
   }
 
   Future<Map<String, Object?>> decisionRead(String id) async {
-    return _runObject(['decisions', 'show', id]);
+    return _runObject(['decisions', 'show', id, '--with-refs']);
   }
 
   Future<List<Map<String, Object?>>> decisionCoverage() async {