Replaced the fixed 3x interval multiplier with an adaptive threshold
based on the configured interval duration. Health states (`Healthy`,
`Degraded`, `Unhealthy`) were redefined to reflect this change.
- Adaptive multiplier: 3x for fast intervals (<10s), 1.5x for slower
intervals (≥10s), ensuring faster problem detection for longer
intervals and tolerance for jitter in shorter intervals.
- Updated `CheckHealthAsync` to calculate `maxAllowedDelay` using the
adaptive multiplier.
- Added `Multiplier` and `MaxAllowedDelay` to diagnostic data for
better monitoring and debugging.
- Improved documentation and comments to explain the new logic.
TekH
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