Open Policy Agent v1.17.1

A focused security release that updates the Go toolchain to version 1.26.4 to resolve specific vulnerabilities in the HTTP and crypto standard libraries. This release contains no functional code changes relative to v1.17.0.

Security update for Go runtime (v1.26.4) — This update addresses critical vulnerabilities in the Go standard library (specifically impacting HTTP handling and cryptography) that could compromise the OPA engine. Moving to the latest Go runtime ensures the underlying infrastructure of your policy engine remains hardened against known exploits.