Telemetry: Uploading

[nikomatsakis]

Get telemetry data off the machine and into a shared store.

Part of the telemetry initiative — see sync discussions: June 9, June 23.

Milestones

• Foundation coordination — Liaison with Rust Foundation to stand up a data collection endpoint. Agree on data schema, retention policy, access controls. Decide auth mechanism.
• Upload command — cargo agents telemetry upload for manual push of local events. Later: automatic periodic upload if opted in. End-to-end integration test.
• Build pipeline secret — If auth is key-based: inject secret at build time in CI, strip from debug builds. Ensure open-source builds still work without the secret (graceful no-op).

Notes

• This workstream depends on the local infrastructure (workstream 1) being in place.
• Upload is explicitly a separate opt-in step from local gathering.