[pipecat-docs-bot]

Automated documentation update for pipecat PR #6351.

Changes

• client/rtvi-standard.mdx: bot-output now documents output_type (what kind of text the message holds); text_type and aggregated_by are listed as deprecated aliases, removed in 2.0.0.
  Also removed a stale duplicate aggregated_by entry that pointed at text_type.

Gaps identified

• JS client pages (api-reference/client/js/callbacks.mdx, client/concepts/events-and-callbacks.mdx, client/guides/building-a-voice-ui.mdx) still read text_type; left unchanged since the server still sends it and client library support for output_type is outside this PR.
• api-reference/server/frames/data-frames.mdx AggregatedTextFrame.text_type is a frame field, unaffected by this PR.

Automated review

• client/rtvi-standard.mdx: the bot-output field list still had an old aggregated_by entry at the end (telling readers to use text_type) next to the new deprecated entry. Removed the old one.
• Claims checked against models.py and observer.py: output_type is required, text_type and aggregated_by are optional, all three carry the same value, removal in 2.0.0. No problems found there.
• reference-findings.txt was empty, and check-reference.py reports nothing.
• JS client pages still read text_type, which the server still sends. Left unchanged.

[github-actions]

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