feat: enable kafka in all unix builds

[de-sh]

Fixes #XXXX.

Description

As the CI points out, librdkafk linking for some unix targets doesn't work as expected. This PR will have to remain open until the underlying problem is figured out.

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This PR has:

• been tested to ensure log ingestion and log query works.
• added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
• added documentation for new or modified features or behaviors.

[coveralls]

Pull Request Test Coverage Report for Build 12840945205

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage remained the same at 12.715%

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Files with Coverage Reduction	New Missed Lines	%
src/option.rs	1	0.0%

Totals
Change from base Build 12840753936:	0.0%
Covered Lines:	2459
Relevant Lines:	19340

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💛 - Coveralls