[FEAT] Enforce TLS 1.2 as minimum for shell HTTP client

Description

The shell HTTP client currently uses default TLS configurations which may allow outdated and insecure TLS versions (like 1.0 or 1.1) depending on the environment's default crypto policy.

Proposed Improvement

Explicitly enforce TLS 1.2 as the minimum supported version in newHttpClient to ensure a consistent and secure communication baseline, protecting against downgrade attacks and known vulnerabilities in older TLS protocols.