fix(bench): replace frame() calls with read_frame(0) after API change

[mvoof]

No description provided.

[gemini-code-assist]

Code Review

This pull request updates the telemetry benchmarks to use read_frame(0) instead of frame(). However, because the benchmarks use mock connections with null event handles, calling read_frame(0) triggers a 16ms sleep on every iteration. This causes the benchmarks to measure sleep overhead rather than actual frame parsing performance. It is recommended to revert these changes and keep using the frame() method.

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