v0.4.8

Changed

• Removed Helpers::Embedding direct Ollama bypass; all embedding generation now routes through Legion::LLM::Embeddings.generate
• Runners::Knowledge, Helpers::Writeback, and Actor::WritebackVectorize all use Legion::LLM::Embeddings.generate and extract [:vector] from the result hash
• Zero-vector fallback (Array.new(1024, 0.0)) preserved when LLM is unavailable or returns nil vector

Removed

• lib/legion/extensions/apollo/helpers/embedding.rb — direct Faraday/Ollama embedding bypass (superseded by Legion::LLM provider routing)
• spec/legion/extensions/apollo/helpers/embedding_spec.rb — tests for removed helper