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security: add trusted_source warnings for pickle deserialization and HMAC signing for distributed feature sets#2772

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dfgvaetyj3456356-hash wants to merge 1 commit into
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dfgvaetyj3456356-hash:security/pickle-warnings-and-hmac-signing
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security: add trusted_source warnings for pickle deserialization and HMAC signing for distributed feature sets#2772
dfgvaetyj3456356-hash wants to merge 1 commit into
alteryx:mainfrom
dfgvaetyj3456356-hash:security/pickle-warnings-and-hmac-signing

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Security fix for pickle deserialization warnings and HMAC signing for distributed feature sets.

…HMAC signing for distributed feature sets

- read_entityset() now warns when loading pickle-format data without trusted_source=True
- load_features() propagates trusted_source to entityset deserialization
- calculate_chunk() adds optional HMAC-SHA256 signing via FEATURETOOLS_DISTRIBUTED_SECRET env var
- SecurityError raised on signature verification failure in distributed computing
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