docs(spikes): OpenWorkflow and Pi SDK compatibility spikes + ADR-002/003 (W0-B)

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

spikes/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "umt-spikes",
+  "private": true,
+  "type": "module",
+  "dependencies": {
+    "openworkflow": "0.10.1",
+    "postgres": "^3.4.9",
+    "kysely": "^0.28.0",
+    "pg": "^8.13.0",
+    "@earendil-works/pi-agent-core": "0.87.1",
+    "@earendil-works/pi-ai": "0.87.1",
+    "tsx": "^4.20.0"
+  }
+}