tests/docs: unique-name driver loading; moving-path lifecycle and settings notes; VIV predeclare renamed

Tests load research drivers via importlib under unique module names
instead of a bare 'import run' (shared-process collision between the
Dütsch and VIV drivers). lifecycle.md qualifies immutable geometry and the
host-only get_flags for translating circles; supported_settings.md points to
the dense-only moving-circle feature; leontini_viv_predeclare.md is renamed
viv_re150_predeclare.md (Re 150 Kolahdouz/Qin case) with references updated.

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

docs/supported_settings.md

@@ -82,6 +82,13 @@ Tests: `tests/unit/test_jets.py`, `test_jets_review.py`, `test_shifted_jets.py`,
 - DFG 2D-1 Re 20 (V4, SRT, t* 60, pressure-NEQ outlet and local Zou-He inlet): refined and uniform
   runs were NOT_STEADY under the frozen steady rule, so no interval verdict was given.
 
+## Moving circles (dense `Simulation`, uniform grid only)
+
+Translating circles with optional spin are supported on the dense double
+buffer D2Q9 FP32 path only (not on `FixedPatchStepper` or refined levels).
+API, supported/rejected modes and limits: `docs/moving_bodies.md`; stage-1
+evidence: `docs/validation/moving_bodies_stage1.md`.
+
 ## Not supported in this release
 
 3D, dynamic/automatic AMR (tagging, time-varying hierarchies beyond `remap_finest`),