go: after(d) timer stub + 13 pattern tests → runtime 40/40, Phase 5 closed [shapes-scheduler]

Acceptance bar hit (40 runtime, 497 total). Tests: timer ready,
select-with-timeout, fan-in (3 producers), worker queue, pipeline,
fan-out-then-fan-in, select source-order, fallback case, default,
producer-consumer, two-stage pipeline, channel-counter, after+default,
tick-collector.

Shape chiselled: timer collapses "after duration" into
"channel ready immediately" — select needs only ready? from each
case. Real time is when the flip happens, not what the protocol is.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.mcp.json

@@ -2,7 +2,7 @@
   "mcpServers": {
     "sx-tree": {
       "type": "stdio",
-      "command": "./hosts/ocaml/_build/default/bin/mcp_tree.exe"
+      "command": "/root/rose-ash/hosts/ocaml/_build/default/bin/mcp_tree.exe"
     },
     "rose-ash-services": {
       "type": "stdio",