6 ounces cream cheese, softened at room temperature 2 teaspoons minced green-onion tops 1 1/2 teaspoons minced shallot 1 1/2 teaspoons minced capers 1 teaspoon freshly squeezed lemon juice, plus 1/4 teaspoon finely grated lemon zest Pinch salt Pinch cayenne 4 ounces smoked salmon, finely chopped 6 to 8 very small cucumbers, such as Persian…