Release v1.7.0

[gianlucam76]

✨ Key Highlights

• Reconciliation Stability (#1657): Fixed "reconciliation storms" in production environments by implementing a robust NextReconcileTime guard and an in-memory cooldown map to prevent tight loops and high CPU usage.
• Discovery Optimization (#1644): Drastically reduced API overhead by caching DiscoveryClient and RESTMapper. Added targeted invalidation to discover new CRDs instantly without restarts.
• Granular Helm Debugging (#1663): Added FailureMessage to individual Helm release summaries, making it easier to pinpoint exactly which chart failed and why.
• Unified Promotion Logic (#1666): Shared validation and health check logic across both Auto and Manual promotion modes for consistent guardrails.

Advanced to:

• Helm v4
• Updated to Flux v1 OCIRepository/Bucket sources.
• Upgraded to Go v1.26.1 and CAPI v1.12.4.