fix(delta): specify operator for string comparisons

[drgroot]

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[Copilot]

Pull Request Overview

This PR adds configurability to the operator used for combining filter predicates in the delta storage overwrite method. Previously, filters were always joined with the & operator, but now users can specify a custom operator.

• Adds an optional operator parameter to the overwrite method with a default value of " & "
• Updates the predicate construction to use the configurable operator instead of the hardcoded " & "

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[Copilot]

Pull Request Overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull Request Overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

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