fix: Memory leak in sync modifiers - missing cleanup of name arrays

[andeplane]

Problem

The sync modifiers (synccomputesmodifier.ts, syncfixesmodifier.ts, syncvariablesmodifier.ts) retrieve name arrays from WASM but never delete them, causing memory leaks.

Current Behavior

In all three sync modifiers:

• computeNames, fixNames, or variableNames are obtained via getComputeNames(), getFixNames(), or getVariableNames()
• These CPPArray<string> objects are used in loops but never cleaned up with .delete()
• This causes WASM memory to accumulate over time

Expected Behavior

After the loop completes processing all names, the array wrapper should be deleted to free WASM memory.

Files to Modify

• src/modifiers/synccomputesmodifier.ts - Add computeNames.delete() after line 123
• src/modifiers/syncfixesmodifier.ts - Add fixNames.delete() after line 118
• src/modifiers/syncvariablesmodifier.ts - Add variableNames.delete() after line 120

Solution

Add .delete() calls after each loop completes, similar to how data1DNamesWrapper, lmpData, and data1DVector are already being deleted elsewhere in the code.

Related

Part of modifier class improvements to fix memory leaks and reduce code duplication.