fix(google-genai): Map messages to the gen_ai conventions - #24352
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fix(google-genai): Map messages to the gen_ai conventions#24352logaretm wants to merge 4 commits into
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Google's `Content` was reported verbatim, so `gen_ai.input.messages` carried
`{role, parts: [{text}]}` instead of `{role, parts: [{type, content}]}`. The
product's normalizer drops parts it cannot type, so none of the input messages
rendered, and `role: "model"` is not a `gen_ai` role.
Every part kind is now translated (text, thought, function call, function
response, inline data, file data), `model` becomes `assistant`, and bare parts
in one array stay one turn so a multimodal message is not split.
A `config.systemInstruction` passed as a `Content` object also never reached
`gen_ai.system_instructions`: it was routed through `extractSystemInstructions`,
which only reads `.content`. It is now read straight off the config.
Also sets `gen_ai.output.messages`, which this integration never wrote. Relay's
migration of the deprecated `gen_ai.response.text` is lossy for tool calls, so a
turn that only called a tool rendered an empty Output.
Fixes #24327
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Google GenAI reported its own
Contentshape, so no input message rendered, fixed by mapping parts and roles to the conventions.I added tests covering each part kind, an object
systemInstruction, and a tool call's output messages.closes #24327