Joe Savona 95e0103a5d
Add bounded streaming discovery for statusline providers ( #61250 ) ...
## What changed
Add a statusline provider discovery stream that publishes the first inventory or named lookup result for each MCP server. Give global inventory a two-second head start, then probe known servers with at most four concurrent lookups while continuing to discover servers from inventory pages. Completed inventory triggers probes for missing known servers immediately.
Bound each refresh and each selected-provider lookup to five seconds, with independent deadlines. Report server and inventory failures separately, and cancel outstanding discovery waits when the stream is dropped.
## Testing
Add tests with controlled app-server replies and paused time covering inventory/probe races, concurrency limits, timeouts, cancellation and reopening, missing servers, and repeated pagination cursors.
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Joe Savona
95e0103a5d