## Why
Enabling, disabling, or reinstalling a cached remote plugin can change its
effective MCP servers, hooks, and skills without materializing a new bundle.
These transitions need to invalidate plugin consumers just like bundle updates
and removals do.
## What changed
- Report a unified set of changed remote plugins and their affected
capabilities for materializations, removals, and installed-state changes.
- Derive enablement and reinstall changes by comparing installed snapshots,
while keeping materialization metadata separate for hook trust handling.
- Preserve removal notifications even when stale cache cleanup fails, and use
all reported changes to refresh loaded plugin state and runtime consumers.
## Testing
Added coverage for cached plugin enablement, disablement, removal, and
reinstallation, including removal when cache cleanup cannot complete.
GitOrigin-RevId: 86d9c1356f7cf70b3c85effebc3e5986b931bdba
bb998aeb8e