v0.9.2

Fixes edge cases in allocator detection and TSC calibration that caused panics or silent zero-byte reports on certain hardware and project configurations.

Fixed

• #[cfg_attr(..., global_allocator)] now detected by allocator analysis, fixing zero-byte reports for projects using conditional allocator attributes (#237)
• Multiple #[cfg(...)] attributes on the same allocator static correctly combined, so fallback negation works on all platforms (#238)
• Failed allocations (null pointer) no longer counted, matching the behavior of realloc() (#239)
• TSC calibration no longer panics when the hardware counter does not advance (#240)