fix(storage): classify version mismatch as retryable

[sbalabanov]

Summary

• classify SubmitQueue and Stovepipe storage.ErrVersionMismatch sentinels as retryable infrastructure errors at declaration
• remove controller-level retryability wrappers for version mismatches
• update tests and documentation to reflect declaration-level classification

Testing

• make test
• make lint
• make check-tidy
• make check-gazelle

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