v0.64.0

Changed

• Breaking — FileFlux takes embeddings from the container's Microsoft.Extensions.AI IEmbeddingGenerator<string, Embedding<float>>; its own IEmbeddingService and EmbeddingPurpose are removed. Semantic chunking gets its embedder
  from that generator through FluxCurator's EmbeddingGeneratorEmbedder (an IEmbedder registered before AddFileFlux()
  still wins), so OpenAI, Azure OpenAI, Ollama, IronHive and LMSupply generators work with no FileFlux-specific adapter.
  AddLMSupplyEmbedding now registers LMSupplyEmbedderService as that generator (it owns and disposes the model);
  MockEmbeddingService is removed. Migration: register an IEmbeddingGenerator<string, Embedding<float>> instead of an
  IEmbeddingService (for an implementation of your own, implement the generator interface or wrap your client with its
  Microsoft.Extensions.AI adapter); code that called GenerateEmbeddingAsync(text, purpose) calls
  GenerateVectorAsync(text).

Dependencies

• Re-pinned sibling package(s) FluxCurator 0.14.0 -> 0.15.0.
• FluxCurator 0.15.0 -> 0.16.0: its generator embedder reads the dimension when it is used, so the IEmbedder FileFlux
  builds from the container's generator no longer fails at resolution — and with it every FileFlux service — for a
  generator that reports no dimension; only semantic chunking with it fails, naming the dimension to pass.