test: add enforcement test for Streaming module inclusion

Ensures all classifiers (Bayes, LSI, KNN, LogisticRegression, TFIDF)
include the Streaming module and respond to required methods. This
catches missing implementations when new classifiers are added.

Author: cardmagic

test/streaming/streaming_test.rb

@@ -335,3 +335,35 @@ def test_delete_checkpoint_requires_storage
     end
   end
 end
+
+class StreamingEnforcementTest < Minitest::Test
+  CLASSIFIERS = [
+    Classifier::Bayes,
+    Classifier::LSI,
+    Classifier::KNN,
+    Classifier::LogisticRegression,
+    Classifier::TFIDF
+  ].freeze
+
+  STREAMING_METHODS = %i[
+    train_from_stream
+    train_batch
+    save_checkpoint
+    list_checkpoints
+    delete_checkpoint
+  ].freeze
+
+  CLASSIFIERS.each do |klass|
+    define_method("test_#{klass.name.split('::').last.downcase}_includes_streaming") do
+      assert klass.include?(Classifier::Streaming),
+             "#{klass} must include Classifier::Streaming"
+    end
+
+    STREAMING_METHODS.each do |method|
+      define_method("test_#{klass.name.split('::').last.downcase}_responds_to_#{method}") do
+        assert klass.method_defined?(method) || klass.private_method_defined?(method),
+               "#{klass} must respond to #{method}"
+      end
+    end
+  end
+end