kernels: name compilation entries by storage route (uniform.cu, blocked.cu)

kernel_v2.cu -> uniform.cu (whole-domain NX/NY, Simulation) and
blocks.cu -> blocked.cu (one block window, every blocked level), with
InitTubeFlow_v2 -> InitTubeFlow. All live callers, include comments,
CONFIG.md, lifecycle doc and current-tree tests move together; no alias.
refinement.cu keeps its name until the dense-route decision.
Historical-revision tooling that names the old files (LES source pins,
timing/J campaign runners, TG run_case, supported_settings citations at
888c8038, development notes) is unchanged on purpose.
No arithmetic change; the PTX symbol InitTubeFlow_v2 is renamed.

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

docs/lifecycle.md

@@ -12,8 +12,8 @@ it is; it adds no framework. Line references are to candidate 0f8fdbc3.
 
 Storage routes are separate concerns:
 
-- Original uniform grid (`kernel_v2.cu`, `Simulation`): whole-domain `NX`/`NY`.
-- Blocked levels (`blocks.cu`; `PeriodicBlockStepper` and every blocked
+- Original uniform grid (`uniform.cu`, `Simulation`): whole-domain `NX`/`NY`.
+- Blocked levels (`blocked.cu`; `PeriodicBlockStepper` and every blocked
   `FixedPatchStepper` level): `NX`/`NY` are one block window including halo.
 - Dense refinement levels (`refinement.cu`, `level_blocks[l] is None`).