v1.2.0 Security, Resilience & Observability Upgrade

• feat: Implement API deprecation configuration loading and a runtime quantile prediction model. (aaa3ca6)
• feat: Implement core API endpoints, feature engineering pipeline, and comprehensive documentation for the HPC workload optimizer. (9039d7b)
• test: Add API load tests for concurrent runtime predictions and health endpoint responsiveness with p95 latency checks. (9d4157e)
• ci errors fixed (0f8c970)
• ci errors fixed (713eb35)
• ci errors fixed (5e3b50e)

Full Changelog: v1.0.0...v1.2.0