Unified clock_time subsystem replacing hwtimer/ktime/cputime#11101

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Copilot wants to merge 9 commits intomasterfrom

copilot/refactor-hwtimer-ktime-cputime-again

Commits on Dec 29, 2025

Initial plan
Copilot
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Add unified clock_time subsystem core implementation

Copilot
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BernardXiong
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Add backward compatibility layer and Kconfig integration

Copilot
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BernardXiong
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Add comprehensive documentation for clock_time subsystem

Copilot
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BernardXiong
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Fix code review issues: overflow protection and parameter handling

Copilot
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BernardXiong
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Fix integer overflow vulnerabilities in time calculations

Copilot
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BernardXiong
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Improve comments and documentation for code clarity

Copilot
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BernardXiong
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Remove old hwtimer/ktime/cputime subsystems and fix formatting

Copilot
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BernardXiong
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Add compatibility headers to fix CI build errors

Copilot
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BernardXiong
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