Disk io feature

[Ronitsabhaya75]

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update

Motivation and Context

Closes #950

Apple Container currently lacks detailed per-container filesystem performance metrics (IOPS, latency, fsync frequency, queue depth, storage backend type), making it difficult to diagnose I/O bottlenecks in database workloads, build systems, and ML pipelines.

The fix:

Add --io flag to container stats command that displays detailed filesystem performance metrics:

container stats --io mydb
CONTAINER   READ/s   WRITE/s   LAT(ms)   FSYNC(ms)   QD   DIRTY   BACKEND
mydb        280MB    195MB     4.8       1.4         1    2.1%    apfs

Testing

• Tested locally
• Added/updated tests
• Added/updated docs