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/workerB.out.txt

@@ -0,0 +1,22 @@
+[B] worker started pid=970631 version=v1 runtime=deno 2.9.7
+[B] run=1fdbe2ec step=copy-file start
+[B] run=1fdbe2ec step=copy-file end
+[B] run=1fdbe2ec step=register version=v1
+[B] run=1fdbe2ec step=cleanup 
+[B] run=a6855da5 step=work 
+[B] run=3306be9c step=work 
+[B] run=5400dd52 step=work 
+[B] run=7d9932a2 step=work 
+[B] run=356cd393 step=work 
+[B] run=493d6178 step=work 
+[B] run=4aed4f53 step=work 
+[B] run=89194738 step=work 
+[B] run=42285c79 step=work 
+[B] run=981eb93b step=work 
+[B] run=a929d9fd step=work 
+[B] run=4db4dc54 step=work 
+[B] run=3e1a7577 step=work 
+[B] run=b5c77ed8 step=work 
+[B] run=3dcac3f6 step=work 
+[B] run=9fefd4e0 step=work 
+[B] worker stopped gracefully