Allow arbitrary registry environment value types

[ricardo-devis-agullo]

Summary

• widen registry env values from strings to arbitrary JavaScript values, matching existing runtime behavior
• document that values are exposed through both context.env and the data-provider process.env shim
• verify boolean values remain booleans through both execution paths
• add a patch changeset

Test plan

• npm run build --workspace=oc
• npm run test-silent --workspace=oc (961 tests)
• git diff --check

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