Fix Pydantic models definition (#16008)

...nt/llama-index-agent-lats/llama_index/agent/lats/types.py

...-integrations/agent/llama-index-agent-lats/pyproject.toml

...ings-alephalpha/llama_index/embeddings/alephalpha/base.py

...beddings/llama-index-embeddings-alephalpha/pyproject.toml

...beddings-anyscale/llama_index/embeddings/anyscale/base.py

...embeddings/llama-index-embeddings-anyscale/pyproject.toml

...ings-databricks/llama_index/embeddings/databricks/base.py

...beddings/llama-index-embeddings-databricks/pyproject.toml

...-mixedbreadai/llama_index/embeddings/mixedbreadai/base.py

...ddings/llama-index-embeddings-mixedbreadai/pyproject.toml

...x-embeddings-nvidia/llama_index/embeddings/nvidia/base.py

...s/embeddings/llama-index-embeddings-nvidia/pyproject.toml

...x-embeddings-ollama/llama_index/embeddings/ollama/base.py

...s/embeddings/llama-index-embeddings-ollama/pyproject.toml

...x-embeddings-openai/llama_index/embeddings/openai/base.py

...s/embeddings/llama-index-embeddings-openai/pyproject.toml

...ndpoint/llama_index/embeddings/sagemaker_endpoint/base.py

.../llama-index-embeddings-sagemaker-endpoint/pyproject.toml

...x-extractors-entity/llama_index/extractors/entity/base.py

...s/extractors/llama-index-extractors-entity/pyproject.toml