[konstantinoscs]

Summary

• Make SQL-like strings and native PyIceberg BooleanExpression objects the canonical delete filters.
• Make Table.column() build structural PyIceberg predicates for all six comparisons, composition, and inversion.
• Remove the unsafe rendered-PyArrow-string parser.
• Raise PyArrowFilterMigrationError before write credential escalation for legacy PyArrow expressions/lists.
• Document the migration mapping.

Migration

• pc.field("age") >= 18 → table.column("age") >= 18
• [a, b] → a & b
• Compose with &, |, and ~, or pass a native PyIceberg expression/string directly.

Identifiers and literals containing and, or, or not are now handled structurally. S3 Tables/BYO catalog routing and credential behavior are unchanged.

Verification

• Covers ==, !=, >, >=, <, <=, logical composition/inversion, nested and case-sensitive names, pathological text, unchanged forwarding, and pre-vend migration failures.
• Full Stack A suite from the top: 225 passed, 10 skipped.

Stack

4 of 5 in Stack A. Base: #341. Next: #343.

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