Feature/pdct 1559 download all data should only show data from allowed corpora

[katybaulch]

Description

• Restrict download this search data to only data in allowed corpora
• Restrict download all data to only data in allowed corpora
• Always exclude MCF from download
• Add test coverage for this search and whole data download
• Refactor app token factory into class
• Update existing vespa search tests
• Use LRU cache for whole database download query

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Type of change

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• Bug fix
• New feature
• Breaking change
• GitHub workflow update
• Documentation update
• Refactor legacy code
• Dependency update

How Has This Been Tested?

Please describe the tests that you added to verify your changes.

Reviewer Checklist

• DB_CLIENT DEPENDENCY IS ON THE LATEST VERSION
• The PR represents a single feature (small driveby fixes are also ok)
• The PR includes tests that are sufficient for the level of risk
• The code is sufficiently commented, particularly in hard-to-understand areas
• Any required documentation updates have been made
• Any TODOs added are captured in future tickets
• No FIXMEs remain

[linear]

PDCT-1559 `/searches/download-all-data` should only show data from allowed corpora from app token

[diversemix]

lgtm ... general comment for post-COP (you probably know this) the routers are getting far too much code in at the moment.

[katybaulch]

Yeah totally agree with you. Will raise now :)

lgtm ... general comment for post-COP (you probably know this) the routers are getting far too much code in at the moment.