v0.10.0

v0.10.0: cloud-backed CLI, webhook auto-sync, telemetry (#354)

Bumps the workspace to 0.10.0. This release rolls up the cloud work
already on main (cloud-backed impact/context/entities/log with
size-based routing, anonymous usage telemetry with opt-out) plus one
fix:

- Repos registered while still indexing reported entityCount 0, which
the routing gate cached as 'small repo, stay local' permanently. Counts
are now only trusted from ready repos, and pending entries re-fetch
until status converges.
- sem whoami now explains how registration happens when a repo isn't
registered.