feat(daemon): emit GenAI spans via the Weave Node SDK

[rgao-coreweave]

Summary

Collapses the stale migrate-sdk stack (#73/#75/#76/#77/#78) into one change against main, on published weave@0.16.1. Replaces the hand-rolled OTLP exporter + genaiSpans builders with weave.init() + the SDK genai primitives. Assistant text/thinking become ordered gen_ai.output.messages parts on the chat span; tools nest under it. Subagents flatten (published SubAgent is a leaf): in-session subagent spans parent under the turn tagged gen_ai.agent.name; cross-session teammates get their own turn-trace stitched by conversation_id.

Test plan

• npm run build
• npm test (70 tests)
• Live Weave server run pending.

🤖 Generated with Claude Code

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​anthropic-ai/​claude-agent-sdk@​0.3.202
	weave@​0.16.2

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[socket-security]

Warning

Review the following alerts detected in dependencies.

According to your organization's Security Policy, it is recommended to resolve "Warn" alerts. Learn more about Socket for GitHub.

Action	Severity	Alert  (click "▶" to expand/collapse)
Warn		Obfuscated code: npm @protobufjs/float is 90.0% likely obfuscated Confidence: 0.90 Location: Package overview From: package-lock.json → npm/weave@0.16.2 → npm/@protobufjs/float@1.0.2 ℹ Read more on: This package | This alert | What is obfuscated code? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: Packages should not obfuscate their code. Consider not using packages with obfuscated code. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore npm/@protobufjs/float@1.0.2. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.
Warn		Install-time scripts: npm protobufjs during postinstall Install script: postinstall Source: node scripts/postinstall From: package-lock.json → npm/weave@0.16.2 → npm/protobufjs@7.6.5 ℹ Read more on: This package | This alert | What is an install script? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: Packages should not be running non-essential scripts during install and there are often solutions to problems people solve with install scripts that can be run at publish time instead. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore npm/protobufjs@7.6.5. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.

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