Fix Java TLS bugs

[grcevski]

This PR fixes two separate issues related to Java TLS with MySQL. The problem is intermittent and depends on the payload, but it can be exposed with this DEMO application https://github.com/fstab/2026-grafana-and-friends-meetup.

Essentially, we had two issues:

1. The Java TLS code didn't mark the connection as active ssl connection. This can cause problems with the accumulation of buffers in the mysql BPF detector. We would see proper traffic, but later the encrypted traffic would follow and we'd tack it on. We'd also be parsing TLS buffers that make no sense.
2. Some parts of the MySQL protocol were identified as HTTP2 settings frame. When I wrote the HTTP2 code in the generic tracer initially we had no backup userspace path for HTTP2 detection, so I added code to detect the settings frame as well as the HTTP2 preamble. The problem is that random other protocol bytes can look like a settings frame, in this case MySQL and randomly some SQL statements will not show. Since we have the userspace backup path now, this is not needed anymore and it will also eliminate the false positives.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 43.69%. Comparing base (a598a66) to head (75157f0).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1372      +/-   ##
==========================================
+ Coverage   43.11%   43.69%   +0.57%     
==========================================
  Files         311      311              
  Lines       33851    33851              
==========================================
+ Hits        14594    14790     +196     
+ Misses      18317    18112     -205     
- Partials      940      949       +9     

Flag	Coverage Δ
integration-test	21.58% <ø> (+0.04%)	⬆️
integration-test-arm	0.00% <ø> (ø)
integration-test-vm-x86_64-5.15.152	0.00% <ø> (ø)
integration-test-vm-x86_64-6.10.6	0.00% <ø> (ø)
k8s-integration-test	2.30% <ø> (+2.30%)	⬆️
oats-test	0.00% <ø> (ø)
unittests	44.55% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.