Add missing query() to QueryableStorageEntry3

QueryableStorageEntry2 has always had a single-key-tuple query(k1, k2)
alongside entries()/keys(), but QueryableStorageEntry3 only ever grew
entries()/keys() - nothing in the codebase needed a direct 3-key point
query until BridgeMultisigRuntimeApi's Assets.Approvals lookup. Added
query(k1, k2, k3), mirroring QueryableStorageEntry2's implementation
exactly.

runtime/src/main/java/io/novafoundation/nova/runtime/storage/source/query/api/QueryableStorageEntry3.kt

@@ -12,6 +12,9 @@ typealias QueryableStorageBinder3<K1, K2, K3, V> = (dynamicInstance: Any, key1:
 
 interface QueryableStorageEntry3<I1, I2, I3, T : Any> {
 
+    context(StorageQueryContext)
+    suspend fun query(argument1: I1, argument2: I2, argument3: I3): T?
+
     context(StorageQueryContext)
     suspend fun entries(keys: List<Triple<I1, I2, I3>>): Map<Triple<I1, I2, I3>, T>
 
@@ -32,6 +35,16 @@ internal class RealQueryableStorageEntry3<I1, I2, I3, T : Any>(
     private val key3FromInternalConverter: QueryableStorageKeyFromInternalBinder<I3>? = null,
 ) : QueryableStorageEntry3<I1, I2, I3, T> {
 
+    context(StorageQueryContext)
+    override suspend fun query(argument1: I1, argument2: I2, argument3: I3): T? {
+        return storageEntry.query(
+            convertKey1ToInternal(argument1),
+            convertKey2ToInternal(argument2),
+            convertKey3ToInternal(argument3),
+            binding = { decoded -> decoded?.let { binding(it, argument1, argument2, argument3) } }
+        )
+    }
+
     context(StorageQueryContext)
     override suspend fun entries(keys: List<Triple<I1, I2, I3>>): Map<Triple<I1, I2, I3>, T> {
         return storageEntry.entries(