Windows: Invalid default cache directory

Summary

The default temp directory of the UpdateCache is located in /tmp, which does not exist on Windows.

    def get_default_file_name(self):
        return "/tmp/crawler_update_cache.db"

caosdb-crawler#100 (comment 86460)

Expected Behavior

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Actual Behavior

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Steps to Reproduce the Problem

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Specifications

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• Platform: Which operating system, which other relevant software versions?

Possible fixes

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