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/deno-test.txt

@@ -0,0 +1,14 @@
+Check test/node_apis_test.ts
+running 1 test from ./test/node_apis_test.ts
+global ...
+  node compat under test runner ...
+    node:http mock server + fetch ... ok (15ms)
+    node:child_process spawn + kill ... ok (107ms)
+    fs temp dir + statfs ... ok (6ms)
+    hono app.request SSE ... ok (314ms)
+    workspace package import ... ok (0ms)
+  node compat under test runner ... ok (445ms)
+global ... ok (453ms)
+
+ok | 1 passed (6 steps) | 0 failed (460ms)
+