- `MigrateBilling` passes a string for a tel, previously causing
  NoMethodError when `Payment.for` says `product.price`
- Introduces a new MigrateBilling class in lib so that unit tests
  capture any changes that break this in the future
- Edit .rubocop.yml to exclude `when_ready` from
  `Lint/ConstantDefinitionInBlock`, which was raised just now because
  this commit touched sgx_jmp.rb . I think this is the best solution
  because those constants (`REDIS`, `DB`, etc.) are used as globals
  throughout the codebase. Since many of them require a running EM
  reactor, changing this would require extensive refactoring.

note: in `test/test_admin_command`, the "-removal was to satisfy
rubocop, which my pre-commit hook caught because it only runs rubocop on
changed files.

Sometimes you want to send a message to a handful of people...

to that end: make `SIMKind` easier to hold by making internals, as well
as the raw CONFIG[:sims] entry, protected

It doesn't do anything we need and causes us to need more config we'd
rather not have

- should behave identically to previous script if no rows found,
  manually running it just produces an empty array for
  `PortRepo::Db.list`, i guess our client knows about no rows errors
- allowed `OptionParser.new` to hold a huge block because this block is
  just naturally very large. Alternatively, we could write separate
  files just for argument parsing, eg `lib/bin_arg_parsers/{args.rb,
  parser.rb}`. But that's probably a separate ticket

problem was that AvailableNumber.for sometimes returned a promise,
sometimes not, causing us to try to call `catch_after` on a Tn

Also redeem the invite at the time if found. HACK: always assumes USD plan

And don't return anything where source starts with xmpp: we'll use that
for internal inventory stuff like offer codes.

* 'downcase-jids' of https://git.secluded.site/sgx-jmp:
  fix: make JID lookups case-insensitive

Centralizes JID normalization in QueryKey::JID.for and ensures Redis
stores lowercase JIDs in create/change_jid methods.

Fixes: https://todo.sr.ht/~singpolyma/soprani.ca/203

- detect if resource-part indicates a client that renders open
  validation in forms

To diagnose ~singpolyma/soprani.ca#493

registered? never returns nil, no need to handle it

Display customer ID and contact information (Jabber ID, phone number)
when selecting actions to help admins identify which customer they're
working with.

Implements: https://todo.sr.ht/~singpolyma/soprani.ca/465
Assisted-by: MiniMax M2 via Crush <crush@charm.land>