Merge codex/src-coherence-callers (7b652b2) into claude/src-coherence (ae53fad)

Conflicts (6 files): tests took the caller-migration side, then the
358bed1 renames (_level_boundaries -> _device_boundaries); run_refined_dfg.py
kept ae53fad (same jet_interval level= repair plus blocked_coarse_tables on the
current-checkout path). Follow-up renames in 5 auto-merged tests;
blocked_fine_tables imported from refinement_tables. Frozen drivers untouched
(run_jet_circle_cv.py, check_projected_pairs.py remap_child, historical DFG path).

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

tests/validation/multigrid/test_refinement_blocked_base.py

@@ -205,7 +205,7 @@ class BlockedBaseCPU(unittest.TestCase):
                                         level_blocks=[(3, 4), FINE_BLOCK],
                                         level_objects=[(), (circle(actuation(.002)),)])
             try:
-                backend.initialize(state(NY, NX, 1), state(*backend.patch.fine_shape, 2))
+                backend.initialize(state(NY, NX, 1), state(*backend.hierarchy.pairs[0].fine_shape, 2))
                 coarse, fine = backend._levels
                 current, spare, fine_current = coarse.current, coarse.spare, fine.current
                 backend.step(2)
@@ -256,7 +256,7 @@ class BlockedBaseCPU(unittest.TestCase):
         with mocked_backend() as m:
             backend = FixedPatchStepper(config("periodic"), context=m["context"], refinements=[BOUNDS],
                                         level_blocks=[(3, 4), FINE_BLOCK])
-            backend.initialize(state(NY, NX, 1), state(*backend.patch.fine_shape, 2))
+            backend.initialize(state(NY, NX, 1), state(*backend.hierarchy.pairs[0].fine_shape, 2))
             m["functions"]["BlockCoalesce"].side_effect = RuntimeError("injected parent stage failure")
             current = backend._levels[0].current
             with self.assertRaisesRegex(RuntimeError, "injected parent stage"):