v2.5.18: Merge pull request #384 from AInVFX/main

• 🚀 CLI: Streaming mode for long videos - New --chunk_size flag processes videos in memory-bounded chunks, enabling arbitrarily long videos without RAM limits. Works with model caching (--cache_dit/--cache_vae) for chunk-to-chunk reuse (inspired by disk02 PR contribution)
• ⚡ CLI: Multi-GPU streaming - Each GPU now streams its segment internally with independent model caching, improving memory efficiency and enabling --temporal_overlap blending at GPU boundaries
• 🔧 CLI: Fix large video MemoryError - Shared memory transfer replaces numpy pickling, preventing crashes on high-resolution/long video outputs (inspired by FurkanGozukara PR contribution)