Keep generated Convex types inside lib/collab

The capture's server-error check moves to isConvexFunctionError beside
the repository's other error helpers (convex_architecture_test).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
9d0deab327Dara Adedeji committed on 10/13/2026, 8:06:51 PMparent3c968d7

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