Add last crawl and subscription status indicators to org list

[tw4l]

Fixes #2260

• Adds lastCrawlFinished to Organization model, updated after crawls are added/deleted and with an idempotent migration to backfill existing orgs (migration is 0038 to account for migrations in feat: Public collections #2271)
• Adds Last Crawl column to end of admin orgs list table
• Adds subscription icon next to existing status icon in orgs list
• Adds "lastCrawlFinished", "subscriptionStatus", and "subscriptionPlan" sort options to orgs list backend endpoint in anticipation of future sorting/filtering of orgs list (best handled in a separate PR, though the client-side searching added in Add fuse-backed org search to superadmin org list #2277 may make this less pressing)

Note

Should be merged after #2271 so migrations stay in correct order

Screenshots

Subscription status

(Taken with local frontend against dev backend - update when we can push this to dev and populate the Last Crawl field)

Last crawl

(Taken with local frontend and backend, no subscriptions)

Testing

• Deploy locally or to dev
• Verify that orgs with crawls now have lastCrawlFinished
• Go to orgs list and verify that last crawl and subscription indicator are present

[emma-sg]

Tested locally, looks good!

[SuaYoo]

Sweet!

[Shrinks99]

Looks good! Tried to give some of the icons more distinct options? Having two status icons next to eachother without labels is a bit of a low point of our table row styling... Will probably give this some more thought in the future as it also relates to collections & archived items, but good enough for now! A helpful indicator to have in the list!

[ikreymer]

Looks good, just converted to draft to avoid accidentally merging before the other PR.