🧹 Use parameterized logging in ServerCommandExecutor

[cuspymd]

This change addresses a code health issue where manual string concatenation was used in a logger call. By switching to parameterized logging with SLF4J's '{}' placeholders, we improve the maintainability and performance of the codebase.

Changes:

• Modified src/main/java/cuspymd/mcp/mod/server/tools/ServerCommandExecutor.java to use parameterized logging in the error handler of executeCommands.

Verification:

• Manual inspection of the code change confirms it adheres to SLF4J best practices.
• Grep was used to ensure no other similar issues exist in the src directory.
• Code review confirmed the fix is correct and safe.

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PR created automatically by Jules for task 8126266847326778838 started by @cuspymd

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