fix(lock): validate process identity using create time#141
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Summary
Prevent false detection of a running TapMap instance when an operating system reuses a PID.
Changes
Motivation
The previous implementation identified a running instance using only the PID. Since operating systems may reuse PIDs after a process exits, a stale lock file could incorrectly prevent TapMap from starting. Using the process creation time ensures that the lock file refers to the original process instance.