epic: the prototype, merged #42

The prototype that implements docs/design.md is one linear stack of pull requests. This tracks merging it into main, from the bottom:

1. feat(land): add targets, policy and the landing queue #13 targets, policy and the landing queue
2. feat(store): delete objects and remember when they were stored #36 deleting objects, and remembering when they were stored
3. feat(policy): drop statement payloads past their retention #37 dropping statement payloads past their retention
4. feat(workspaces): add copy-on-write workspaces #14 copy-on-write workspaces
5. feat(events): add the op log, undo and watch #15 the operation log, undo and watch
6. feat(server): add OriginService, the HTTP API and the client SDK #4 OriginService, the HTTP API and the client SDK
7. feat(sync): add clone, push, fetch and remote landing #5 clone, push, fetch and remote landing
8. feat(permissions): add capabilities and scoped tokens #6 capabilities and scoped tokens
9. feat(ci): add the origin-ci plugin #16 the origin-ci plugin
10. chore(skills): add the swarm scenario skill #17 the swarm scenario skill

Every branch was rebased on main on 10 November 2026 and is mergeable. #17's macOS job fails while #16 below it passes.

Nothing in the stack has to change for hosting: what a hosted node needs is additive and is tracked in the v0.2 milestone. The stack's two known defects are sub-issues here.