Make smart call deduplication

tests/test_pipeline.py

@@ -60,3 +60,49 @@ def test_default_consumer_args():
     )
     res = p2(B(42.1))
     assert res == (42, "(42, (42, '42'))")
+
+
+def test_pipeline_with_subgraph_duplicates():
+    repo = ConvRepo()
+
+    b_to_a_calls = [0]
+
+    @repo.mark_injector()
+    def b_to_a(b: B) -> A:
+        b_to_a_calls[0] += 1
+        return A(int(b.b))
+
+    @repo.mark_injector()
+    def a_to_b(a: A) -> B:
+        return B(float(a.a))
+
+    @repo.mark_injector()
+    def int_to_a(i: int) -> A:
+        return A(i)
+
+    type ret1 = tuple[int, str]
+
+    cons1_calls = [0]
+    cons2_calls = [0]
+
+    def consumer1(dep: A, opt_dep: optC = '42') -> A:
+        cons1_calls[0] += 1
+        return A(dep.a + int(opt_dep))
+
+    def consumer2(dep: A) -> optC:
+        cons2_calls[0] += 1
+        return str(dep.a)
+
+    p1 = repo.create_pipeline(
+        (B,),
+        [consumer1, consumer2, consumer1, consumer2, consumer1, consumer2, consumer1, consumer2, consumer1],
+        force_commutative=True,
+        allow_sync=True,
+        allow_async=False,
+        force_async=False
+    )
+    res = p1(B(42.1))
+    assert res.a == 42 + (42 * 31)
+    assert b_to_a_calls[0] == 1
+    assert cons1_calls[0] == 5
+    assert cons2_calls[0] == 4