generated: add realtime reporter methods to gatewayobs

[russellmartin-livekit]

Summary

Regenerated observability/gatewayobs from the cloud-observability schema/gateway.yaml realtime (speech-to-speech) billing columns merged in cloud-observability #502.

Adds these methods to the gateway model reporter / ModelTx (and the noop impls):

ReportRealtimeDurationSeconds(uint32)
ReportRealtimeInputTextTokens(uint64)
ReportRealtimeInputAudioTokens(uint64)
ReportRealtimeInputImageTokens(uint64)
ReportRealtimeInputVideoTokens(uint64)
ReportRealtimeOutputTextTokens(uint64)
ReportRealtimeOutputAudioTokens(uint64)
ReportRealtimeCachedTextTokens(uint64)
ReportRealtimeCachedAudioTokens(uint64)

Generated via generate-schema --schema-file schema/gateway.yaml (mirrors the existing STT/TTS/EoT reporter generation). Only the generated gen_reporter.go / gen_reporter_noop.go change (plus a version-hash bump); no new enum types, so gen_source.go is untouched.

Why

This is the missing write-side link in the realtime billing chain. The read/billing side is built (backend-common #939, analytics-recorder #949) and reads the realtime_* ClickHouse rollup columns — but nothing emits them yet. With these methods, agent-gateway (#876) can report realtime usage into the realtime_* columns instead of piggybacking on the inference_*/stt_duration columns.

Chain

• cloud-observability split participant and room services #502 — realtime_* columns ✅ merged
• protocol (this PR) — gatewayobs ReportRealtime* methods
• agent-gateway Remove @ that broke changeset #876 — bump protocol, emit realtime_*, drop the LLM/STT stopgap
• backend-common Update dependency typescript to v5.7.3 #939 / analytics-recorder Participant joined_at_ms to get higher resolution of join time. #949 — cost + invoice (read side)

Test plan

• go build ./observability/gatewayobs/
• CI

[changeset-bot]

🦋 Changeset detected

Latest commit: d5f34d6

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
github.com/livekit/protocol	Patch
@livekit/protocol	Patch

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