Rename default overlay to single-cluster

"default" is a kubebuilder convention that doesn't say what it actually
deploys. "single-cluster" describes the install topology and pairs
naturally with the cross-cluster overlay planned as a follow-up.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: scotwells

.claude/pipeline/briefs/feat-001-cloudflare-workers-interface.md

@@ -0,0 +1,45 @@
+---
+handoff:
+  id: feat-001
+  from: user
+  to: product-discovery
+  created: 2026-02-24T00:00:00Z
+  context_summary: "Introduce a Cloudflare Workers-style interface that builds on the existing Workload concept but provides a simplified developer experience"
+  decisions_made: []
+  open_questions:
+    - "What problem does this solve?"
+    - "Who are the target users?"
+    - "What aspects of Cloudflare Workers should be replicated?"
+    - "How does this differ from the existing Workload resource?"
+    - "What platform capabilities are required (Quota, Insights, Telemetry, Activity)?"
+  assumptions: []
+---
+
+# Feature Request: Cloudflare Workers-Style Interface
+
+**Requested by**: User
+**Date**: 2026-02-24
+
+## Initial Description
+
+I'd like to brainstorm on how we could introduce a Cloudflare Workers type concept. The concept should build on the workload concept that's already defined in the repo but likely exposed as a simplified interface.
+
+## Context
+
+The compute repository currently defines:
+- **Workload** resource (`compute.datumapis.com/v1alpha`) with sophisticated placement, scaling, and instance management
+- Support for both VMs and Sandbox (container) runtimes
+- Gateway integration for network routing
+- Multi-region deployment with city-code based placement
+- Horizontal autoscaling with metrics
+
+## Notes
+
+This request is awaiting discovery. The product-discovery agent will:
+- Clarify the problem being solved
+- Identify target users and use cases
+- Assess scope boundaries
+- Evaluate platform capability requirements
+- Compare with Cloudflare Workers developer experience
+- Determine how this relates to existing Workload primitives
+- Produce a discovery brief