Phase 2 of the Scalable Approach for Adding New IDE Session Types RFC,
tracked in #27410.
Adds a session_counts map to Stats on the Agent API, so an agent can report
a count per app name instead of the four fixed fields, which are now marked
deprecated. Bumps the API to v2.11.
- coderd normalizes names on ingest, caps distinct entries, and sums the
overflow under unknown, so an arbitrary client name cannot blow up
cardinality.
- Agents predating v2.11 set the fixed fields instead, never both, and the
ingest path falls back to them.
Nothing sends session_counts yet. The agent starts populating it in #28338.
Ehab Younes
903d7b756d