docs(spikes): Deno 2.9.7 + TS 7 compatibility spike and ADR-004

Co-Authored-By: Claude Fable 5.1 <[email protected]>

spikes/deno/logs/workerA2.out.txt

@@ -0,0 +1,26 @@
+[A] worker started pid=974721 version=v1 runtime=deno 2.9.7
+[A] run=0ef64009 step=work 
+[A] run=db4b002d step=work 
+[A] run=59c3f0a3 step=work 
+[A] run=753c094f step=work 
+[A] run=322c2a2e step=work 
+[A] run=85126efd step=work 
+[A] run=24bd06f4 step=work 
+[A] run=d1635912 step=work 
+[A] run=1d5b5a33 step=work 
+[A] run=ac3a2ef4 step=work 
+[A] run=ca92602e step=work 
+[A] run=70e3a89b step=work 
+[A] run=f82c62f0 step=work 
+[A] run=832cdd09 step=work 
+[A] run=33d05100 step=work 
+[A] run=e83b537d step=work 
+[A] run=cf8a4c6c step=work 
+[A] run=030d8db0 step=work 
+[A] run=85854e33 step=work 
+[A] run=67f86be7 step=work 
+[A] run=0b99c858 step=work 
+[A] run=542354a5 step=work 
+[A] run=818f3e55 step=work 
+[A] run=a4739536 step=work 
+[A] worker stopped gracefully