fix(consensus): restore DisputedTx getYays/getNays accessors

Consensus.h (Phase 4 tracing) depends on DisputedTx::getYays()/getNays()
to build disputeResolve span events. Both accessors were removed by
earlier 'duplicate accessor' cleanup commits on this branch, leaving
Consensus.h referencing non-existent members. CI caught this on
macOS/clang-17/gcc-13/Windows builds.

Restore the accessors on the branch where they were dropped so downstream
phase branches inherit a compiling DisputedTx.h via merge.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/xrpld/consensus/DisputedTx.h

@@ -60,6 +60,20 @@ public:
         return ourVote_;
     }
 
+    //! Number of peers voting to include the transaction.
+    [[nodiscard]] int
+    getYays() const
+    {
+        return yays_;
+    }
+
+    //! Number of peers voting to exclude the transaction.
+    [[nodiscard]] int
+    getNays() const
+    {
+        return nays_;
+    }
+
     //! Are we and our peers "stalled" where we probably won't change
     //! our vote?
     [[nodiscard]] bool