[8.5.1] Update validator for additional Form 99 options and text changes

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Given update to 8.5.1 version, we need to adjust the validator to account for the updated Form 99 specifications.

Note: Go straight to permissive 8.5.1 specifications and enforce behavior on web-app side

QA Notes

Review validator docs to ensure it’s been updated [https://fecgov.github.io/fecfile-validate/|https://fecgov.github.io/fecfile-validate/|smart-link] after merge to develop

DEV Notes

• Update schema to [https://docs.google.com/spreadsheets/d/1O2HKF5ND3YV0TYq87G0g4hKeX-VogoFXLLjORYElyQ4/edit?gid=1789273618#gid=1789273618|https://docs.google.com/spreadsheets/d/1O2HKF5ND3YV0TYq87G0g4hKeX-VogoFXLLjORYElyQ4/edit?gid=1789273618#gid=1789273618]
  ** In text_code (COL SEQ 15), add 'MSA' and 'MSX'
• Commit hash
• For now, disregard COL SEQ 17. This will be blank until implementation of [https://fecgov.atlassian.net/browse/FECFILE-1501|https://fecgov.atlassian.net/browse/FECFILE-1501|smart-link]
• update api and app to use new hash

Design

null

See full ticket and images here: FECFILE-3054

Pull Request: #441

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Todd Lees commented: MSX and MSA added to schema [https://github.com/fecgov/fecfile-validate/blob/6c4e67270689d93c3640734ca0dda50e65649604/schema/F99.json#L318|https://github.com/fecgov/fecfile-validate/blob/6c4e67270689d93c3640734ca0dda50e65649604/schema/F99.json#L318|smart-link]

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Todd Lees commented: !image-20260514-133022.png|width=790,alt="image-20260514-133022.png"!

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Shelly Wise commented: No QA needed on this ticket per DEV (see comments)

Moved to Stage Ready.