Reset column information for Claim on a migration

[kenfodder]

A previous migration removing teacher_reference_number causes issues for this migration.

Without this I get this when running db:migrate from an blank db.

== 20241028110426 BackFillClaimsVerifiedAt: migrating =========================
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled: (StandardError)

PG::UndefinedColumn: ERROR:  column claims.teacher_reference_number does not exist
LINE 1: ...ode" AS t1_r7, "claims"."date_of_birth" AS t1_r8, "claims"."...
                                                             ^
/Users/ken/code/dfe/claim-additional-payments-for-teaching/db/migrate/20241028110426_back_fill_claims_verified_at.rb:4:in `change'
<internal:/Users/ken/.rbenv/versions/3.3.5/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:136:in `require'
<internal:/Users/ken/.rbenv/versions/3.3.5/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:136:in `require'
-e:1:in `<main>'

Caused by:
ActiveRecord::StatementInvalid: PG::UndefinedColumn: ERROR:  column claims.teacher_reference_number does not exist (ActiveRecord::StatementInvalid)
LINE 1: ...ode" AS t1_r7, "claims"."date_of_birth" AS t1_r8, "claims"."...
                                                             ^
/Users/ken/code/dfe/claim-additional-payments-for-teaching/db/migrate/20241028110426_back_fill_claims_verified_at.rb:4:in `change'
<internal:/Users/ken/.rbenv/versions/3.3.5/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:136:in `require'
<internal:/Users/ken/.rbenv/versions/3.3.5/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:136:in `require'
-e:1:in `<main>'

Caused by:
PG::UndefinedColumn: ERROR:  column claims.teacher_reference_number does not exist (PG::UndefinedColumn)
LINE 1: ...ode" AS t1_r7, "claims"."date_of_birth" AS t1_r8, "claims"."...
                                                             ^
/Users/ken/code/dfe/claim-additional-payments-for-teaching/db/migrate/20241028110426_back_fill_claims_verified_at.rb:4:in `change'
<internal:/Users/ken/.rbenv/versions/3.3.5/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:136:in `require'
<internal:/Users/ken/.rbenv/versions/3.3.5/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:136:in `require'
-e:1:in `<main>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)