chore(memtrack): lower on-demand attach log to debug

[not-matthias]

Summary

Downgrades the per-attach "on-demand attached N probes to ..." log from info! to debug! in attach_worker.rs.

This message fires once per successfully attached mapping during on-demand allocator attachment, which is too noisy for the default info level. It belongs at debug.

Testing

• cargo build

[greptile-apps]

Greptile Summary

This PR reduces noise from memtrack on-demand attach logging.

• Changes the successful per-mapping attach message from info! to debug!.
• Leaves attach failure handling and error logging unchanged.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.
• The failure path still returns an error and logs at error level.
• Tests do not assert on this success log.

Important Files Changed

Filename	Overview
crates/memtrack/src/ebpf/attach_worker.rs	Changed the successful on-demand probe attachment log from info level to debug level.

_{Reviews (1): Last reviewed commit: "chore(memtrack): lower on-demand attach ..." | Re-trigger Greptile}

[codspeed-hq]

Merging this PR will not alter performance

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

✅ 17 untouched benchmarks

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_{Comparing cod-1801-only-attach-to-used-libraries-in-memtrack-2 (26fb4b5) with main (6794d28)}