BLD7, BLD8: the Node and image build seats serve the verb steps

Node answers the type-check as lint always, unit where a package has a test
script and integration where it has test:integration, kept in detected-steps by
fingerprint as the Go module keeps it; the image answers none. The manifests
serve it. The step ask's end (step-ended) of BLD7 and BLD8 waits for BLD3 and
the build-step package of mesh-delivery-sdk.

Builds: design 47 G §22, §307, §326, §328

Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ

modules/mesh-build-node/module.json

@@ -21,7 +21,7 @@
     {
       "name": "node-build-node",
       "scope": "node",
-      "serves": ["current", "drop", "pause", "resume"]
+      "serves": ["current", "drop", "pause", "resume", "steps"]
     }
   ],
   "config": {
@@ -65,6 +65,7 @@
     }
   ],
   "requires": [
+    {"name": "detected-steps", "storage": "key-value", "template": "state", "options": {"history": 1}},
     "forge-account",
     "npm-package-registry",
     "node-toolchain",