Zip file export failing frequently

[manuelwedler]

Our repository-chains-archiver job is failing very frequently lately. Out of the last 6 runs only 2 were successful. Since we export it only once per week, the export is getting less up-to-date.

The error for the last failure is:

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/app/node_modules/fast-xml-parser/src/xmlparser/XMLParser.js:30
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throw Error( `${result.err.msg}:${result.err.line}:${result.err.col}` )
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^
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Error: char '&' is not expected.:70:123
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Deserialization error: to see the raw response, inspect the hidden field {error}.$response on this object.
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at XMLParser.parse (/app/node_modules/fast-xml-parser/src/xmlparser/XMLParser.js:30:21)
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at /app/node_modules/@aws-sdk/core/dist-cjs/submodules/protocols/index.js:177:26
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at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
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at async parseXmlErrorBody (/app/node_modules/@aws-sdk/core/dist-cjs/submodules/protocols/index.js:198:17)
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at async de_CommandError (/app/node_modules/@aws-sdk/client-s3/dist-cjs/index.js:4874:11)
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at async /app/node_modules/@smithy/middleware-serde/dist-cjs/index.js:35:20
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at async /app/node_modules/@aws-sdk/middleware-sdk-s3/dist-cjs/index.js:485:18
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at async /app/node_modules/@smithy/middleware-retry/dist-cjs/index.js:320:38
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at async /app/node_modules/@aws-sdk/middleware-flexible-checksums/dist-cjs/index.js:286:18
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at async /app/node_modules/@aws-sdk/middleware-sdk-s3/dist-cjs/index.js:110:22 {
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'$metadata': { attempts: 1, totalRetryDelay: 0 }
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}

My feeling is that the higher number of verified contracts we got recently makes random failures just likelier to appear.

I'm creating this issue mostly for documentation, since we will likely decide to discontinue the file repository (#2235).