[core][python] Reject dynamic write-cols optimization changes

[XiaoHongbo-Hope]

Problem

Enabling data-evolution.write-cols-optimization.enabled through FileStoreTable.copy() changes how normal Data Evolution files encode writeCols, but the option is not persisted in the table schema. A later reader resolves the file schema without that option and can misinterpret omitted writeCols as the full schema. With a dedicated BLOB column, a Java-written fixture returned a null BLOB in both Java and PyPaimon instead of the stored bytes.

Change

Reject a dynamic override when it changes the effective value of this option in both Java and PyPaimon. Same-value overrides remain allowed. Persisted ALTER TABLE changes remain allowed; the option is deliberately not marked immutable.

Validation

• Targeted Java tests for the dynamic guard and persisted optimized BLOB reads passed on JDK 8.
• PyPaimon DedicatedFormatWriterTest: 76 passed, 1 skipped.
• Java Spotless check passed.

This prevents new ambiguous files. It does not rewrite files already produced with an unpersisted dynamic override.