feat(agent): support stack trace in debug=1 format with pprof labels

[AdamMagued]

Resolves #144.

Summary

• Added to allow requesting goroutine stack traces formatted with
• Updated agent to handle by writing pprof goroutine profile with debug level 1, preserving pprof labels
• Added CLI option in to specify debug level while maintaining default behavior
• Added automated unit tests in validating stack trace generation

Verified 100% passing tests in container sandbox.

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