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/ow-happy.txt

@@ -0,0 +1,16 @@
+{"runId":"76f4d2cd-7419-41b0-807d-756157fba672","status":"pending","version":"v1"}
+{"status":"running","version":"v1","attempts":1,"error":null,"output":null}
+{"workflowRunIds":["76f4d2cd-7419-41b0-807d-756157fba672"]}
+{"status":"completed","version":"v1","attempts":3,"error":null,"output":{"sub":{"torrentHash":"hash-d1"},"copied":{"dest":"/lib/d1.mkv"},"signal":{"ok":true}}}
+submit-download    function     completed 
+wait-download      signal-wait  completed 
+copy-file          function     completed 
+register           function     completed 
+retention          sleep        completed 
+cleanup            function     completed 
+76f4d2cd submit-download  A      version=v1
+76f4d2cd copy-file        A      start
+76f4d2cd copy-file        A      end
+76f4d2cd register         A      version=v1
+76f4d2cd cleanup          A      
+{"runId":"76f4d2cd-7419-41b0-807d-756157fba672","status":"completed","version":"v1"}