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

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

spikes/deno/apps/server/deno.json

@@ -0,0 +1,9 @@
+{
+  "name": "@spike/server",
+  "version": "0.0.0",
+  "exports": { ".": "./src/main.ts" },
+  "tasks": {
+    "dev": "deno run -A --watch src/main.ts",
+    "test": "deno test -A test/node_apis_test.ts"
+  }
+}