fix(6247): a getter is seen by its pulls, so the silent list stops naming every pull door

usage and rule_usage gain pulled_by_source, read from the per-source rows
the readout already had, and _silent_surfaces counts those doors as having
emitted. The rules-listing points were seen as of the previous commit,
through rule_usage.by_source.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_retrieval_warnings.py

@@ -279,6 +279,19 @@ def test_a_point_seen_only_in_usage_counts_as_having_emitted() -> None:
     assert "enter_project" not in quiet
 
 
+def test_a_getter_seen_only_by_its_pulls_counts_as_having_emitted() -> None:
+    """A getter surfaces nothing, so no `by_source` ever names it; its pulls
+    are the only sign it records. Without them every pull door reads silent
+    on every active window."""
+    quiet = {p["source"] for p in _silent_surfaces(
+        {}, {"pulled_by_source": {"mcp_get_note": 3}},
+        {"pulled_by_source": {"mcp_get_rule": 2}}, active=True)}
+    assert "mcp_get_note" not in quiet
+    assert "mcp_get_rule" not in quiet
+    # A door with no pulls is still reported.
+    assert "mcp_get_snippet" in quiet
+
+
 # ── settings parsing ──────────────────────────────────────────────────────
 
 @pytest.mark.parametrize("raw,fallback,want", [