New parser has differing behavior on quoted attributes

Surfaced in https://github.com/commercialhaskell/curator/issues/52#issuecomment-3002214345

This is a weird one - the stack repository has a definition that looks like this:

share [ mkPersist sqlSettings
      , mkMigrate "migrateAll"
      ]
      [persistLowerCase|
PrecompiledCacheParent sql="precompiled_cache"
  platformGhcDir FilePath "default=(hex(randomblob(16)))"
  compiler Text
  cabalVersion Text
  packageKey Text
  optionsHash ByteString
  haddock Bool default=0
  library FilePath Maybe
  UniquePrecompiledCacheParent platformGhcDir compiler cabalVersion packageKey optionsHash haddock sql="unique_precompiled_cache"
  deriving Show

The platformGhcDir FilePath "default=(hex(randomblob(16)))" line is strange. I'm not sure how this would have parsed in the old parser or been used, but the new one properly parses but fails to generate the right code.

Start by reading the example definition in Stack/Storage/User.hs around line 100 and trace how the persistent parser handles the quoted attribute. Compare the generated code for this declaration with the expected behavior; the issue does not name a parser source file or test, so those entry points must be located first.