fix: optimize CAN receive timeout timing with perf_counter

[luojiaaoo]

Description

Replace time.time() with time.perf_counter() for CAN receive timeout calculations.

perf_counter() is better suited for measuring elapsed time and avoids issues caused by system clock adjustments, while also providing better timing precision for the receive loop.

[mergify]

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[fallenmi]

Please keep the Coveralls action pinned to a full commit SHA. On exact base b4f82ab, all 9 external Actions references are full-SHA pinned; exact head 0cd6639 changes both Coveralls uses to the mutable v2.3.8 tag, making these the only two mutable refs. Moving that tag would change third-party code executed with the workflow token without a reviewed repository diff. v2.3.8 currently resolves to 8d6379e14d29928660c4ba802d8e85393440b329, so please pin that SHA with a version comment (or retain the prior pin). I separately exercised the timeout loop on the exact base and head; both exit correctly, and the live upstream checks are green.

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