Merge origin/main into polyglot/client-v2-ssl-cipher-suites

Resolve conflict in client-v2 HttpAPIClientHelperTest.java by keeping both
test sets: the cipher-suite selection tests (this PR) and the 502/503
ConnectException tests added on main (#2880). Merged/deduplicated imports;
no test weakened. All other files auto-merged (CHANGELOG keeps both entries;
HttpAPIClientHelper.java keeps both the createHttpClient cipher-suite logic
and main's executeRequest 502/503 handling).

Author: polyglotAI-bot