refactor: use += for period, samples, and count accumulation

[maayanmatsliah-tech]

Wow, this is a cool repo! Made a small cleanup in mx_proftool.py — replaced manual addition assignments with += in merge_perf_events and get_top_methods. No behavior change. Hope this helps!

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[maayanmatsliah-tech]

Hi! I've signed the Oracle CLA. Could you please review when you get a chance?

[dougxc]

hi @maayanmatsliah-tech, thanks for the contribution!

We generally try to keep the git history focused on functional changes or significant refactors. This change is purely stylistic and doesn't impact performance or readability, so we’re going to pass on it to keep the noise in the logs down.

[maayanmatsliah-tech]

Got it. Thanks for the feedback!