fix(sleep): request-triggered wake, create-time config, agent release assets (#62)

- Wake placeholder fired its wake callback unconditionally at boot, so
  sleeping services flapped sleep→wake on every idle timeout. The wake
  call now lives in a CGI script the busybox httpd runs on inbound hits;
  E404 covers non-root paths. URLs/page travel via env, no quoting.
- Wake endpoint tries ordered candidate addresses (self-name on shared
  net, host.docker.internal, edge gateway, probe) — Docker Desktop's VM
  can't reach the bridge gateway, so single-URL wake was dead there.
- CreateServiceRequest accepts sleep_enabled/sleep_idle_minutes and the
  INSERT persists them — previously update-only, silently dropped at
  create. CLI `services create` gains --sleep/--sleep-idle; MCP doc lists
  both; OpenAPI node_id description updated for build-on-node.
- Wake goroutine logs spec/reconcile failures instead of a bare return,
  and marks the service failed when spec build errors.
- scripts/build-cli.sh ships containr-agent-linux-{amd64,arm64} so the
  install-agent.sh GH-releases fallback actually resolves.

Verified live: create-time flags persist and validate (1-1440), service
sleeps on idle and stays asleep, an inbound hit on the placeholder wakes
it (~15s to running), and the placeholder is pruned after reconcile.

Generated with [Devin](https://devin.ai)

Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

scripts/build-cli.sh

@@ -38,8 +38,17 @@ for platform in $PLATFORMS; do
         -ldflags "$LDFLAGS" \
         -o "bin/${MCP_NAME}" \
         ./cmd/mcp
-    
-    echo "✅ Built bin/${OUTPUT_NAME} + bin/${MCP_NAME}"
+done
+
+# Node agents are linux-only — the download endpoint serves the same two
+# arches, and install-agent.sh falls back to these GH release assets.
+for arch in amd64 arm64; do
+    echo "📦 Building agent for linux/${arch}..."
+    CGO_ENABLED=0 GOOS=linux GOARCH=$arch go build \
+        -ldflags "-X main.version=${VERSION}" \
+        -o "bin/containr-agent-linux-${arch}" \
+        ./cmd/agent
+    echo "✅ Built bin/containr-agent-linux-${arch}"
 done
 
 echo "🎉 CLI build complete!"