fix(ghidra): stop dereferencing the removed error payload in address verification

Since #1277 an MCP tool error carries no structuredContent, so the real
Ghidra address-boundary verifier threw a TypeError on its first expected
rejection and never checked the remaining representations or the
alias-preservation control. Assert that the error carries no structured
payload instead.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/lib/real-ghidra-address-boundaries.mjs

@@ -47,7 +47,8 @@ export async function verifyGhidraAddressBoundaries(client, entry, cli) {
       const issues = JSON.stringify(error.details.issues);
       assert.match(issues, /cannot be represented without truncation/u);
       assert.ok(issues.includes(address), issues);
-      assert.equal(reply.structuredContent.evidence, undefined);
+      // A rejected request produces no Evidence; errors carry text only.
+      assert.equal(reply.structuredContent, undefined);
     }
   }
   assert.deepEqual(