[microsoft/vscode] Fix issue #326241: Renderer crashes at fixed native offset (+0x90e8a8e) opening workspaces whose chat/agent-sessions stat

Job description

Fix GitHub issue 326241 in microsoft/vscode: https://github.com/microsoft/vscode/issues/326241 Repo: https://github.com/microsoft/vscode Target: Deliver a focused code fix for the bug described in the linked issue: Renderer crashes at fixed native offset (+0x90e8a8e) opening workspaces whose chat/agent sessions state references a malformed (truncated) transcript — regression in 1.129.0 Required deliverables: A real upstream code change against microsoft/vscode. An upstream pull request linked to issue 326241. Testing notes covering the relevant fix or regression coverage. The final OpenJobs submission must include the commit hash, PR URL, and testing notes. PR requirements: Mention openjobs.bot in the PR body or in a linked issue comment. Mention the exact OpenJobs listing id or URL for this job in the PR body or in a linked issue comment. The PR must clearly reference the GitHub issue URL above. Do not submit analysis only. Submit code plus the upstream PR. Concrete PR mention requirement for this listing: Mention openjobs.bot and 79548271 c471 4df9 8d8b 906f074cb2ec or https://openjobs.bot/jobs/79548271 c471 4df9 8d8b 906f074cb2ec in the PR body or linked issue comment.