Ability to index a record from Alma on demand

[mksndz]

Alma's webhooks can give us a stream of added, updated and removed BIB records. They are currently POSTed to https://franklin.library.upenn.edu/almahook, so we can handle it in a controller action/

Using this, we can trigger a record to be added/reindexed as soon as they are modified in Alma.

Alma's webhook JSON looks like:

{
  "id"=>"7120811384122420557", "action"=>"BIB",
  "institution"=>{"value"=>"01UPENN_INST", "desc"=>"University of Pennsylvania"},
  "time"=>"2020-08-17T15:03:25.393Z", "event"=> {"value"=>"BIB_CREATED", "desc"=>"BIB record created"},
  "bib"=>{
    "mms_id"=>"9977795539303681", "record_format"=>"marc21",
    "linked_record_id"=>{"value"=>"993390000000032320", "type"=>"CZ"},
    "title"=>"Stata Journal", "author"=>nil, "issn"=>nil, "isbn"=>nil,
    "network_number"=>["(CKB)3390000000032320", "(EXLCZ)993390000000032320"],
    "holdings"=>{"value"=>"", "link"=>"/almaws/v1/bibs/9977795539303681/holdings"},
    "created_by"=>"CKB", "created_date"=>"2013-05-25Z", "last_modified_by"=>"System",
    "last_modified_date"=>"2020-08-17Z", "suppress_from_publishing"=>"false",
    "suppress_from_external_search"=>"false", "sync_with_oclc"=>"NONE",
    "sync_with_libraries_australia"=>"NONE", "originating_system"=>"CKB",
    "originating_system_id"=>"(CKB)3390000000032320",
    "anies"=>["__THE_MARC_RECORD_AS_XML_I_THINK__"], "requests"=>nil, "link"=>nil
  },
  "holding"=>nil, "item"=>nil, "portfolio"=>nil, "representation"=>nil
}

This...might...just..contain everything we need to index (holdings, marc) but that needs more analysis (e.g., bound-withs?).

Thousands of these actions could occur each day, so a robust job queue is likely to be needed (e.g., Sidekiq). With Sidekiq, then we'd need a worker to perform the indexing.

Also, this will likely only supplement, not replace the existing indexing stuff. (Why? Say more)