[emmanuelgautier]

Summary

• Reports anonymous CLI usage analytics (command, flag names, exit code, latency) to cache-detective's own Argvio tenant through telemetryx.Instrument, and embeds its public_ingest ingest key. It only allows sending usage data, so it is safe to ship in the binary.
• Removes the OpenTelemetry pipeline (telemetryx.New and the OTel reporter on scan). Argvio's command invocations and exit codes replace the per-command success and error counts.
• Failures are classified (timeout, canceled, network, user, unknown) by x's default classifier. There were no OTel counters to carry over.
• Records a mistyped command as an unknown-command attempt (nearest command as suggestion, never the typed text) through telemetryx.Execute. Shell, terminal and runtime on session start are sent by argvio itself at the Basic tier.
• Uses telemetryx.Exit / telemetryx.Fatal instead of os.Exit / log.Fatal inside commands, so failed runs are recorded and flushed.
• Opt out with --sqa-opt-out, DO_NOT_TRACK or ARGVIO_DISABLED. Interactive runs report at the Basic tier, CI runs at Anonymous. Counters are accepted at the anonymous tier, so they are also sent from CI; they only ever carry fixed identifiers written in code.

Dependency

Uses github.com/cerberauth/x at fc43052 on main (it includes #61 and #66, both merged) and argvio-go v0.4.0, both released. Nothing else needs to merge first.

Test plan

• go build ./..., go vet ./..., go test ./..., golangci-lint run --new-from-rev=origin/main (0 issues)
• Ran the built binary against the live endpoint, including failing commands; exit codes and output are unchanged.
• Error reasons and counters are accepted by Argvio v0.5.0, but the dashboard panels for them (getargvio/ui#26, [S3] Cache-key explosion / cache-busting DoS check #27) don't exist yet, so they can't be checked there for now.

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