Increase mkt_clickid character limit to 255

[dumkydewilde]

As mentioned in #1311, some of Meta's fbclid parameter values are over 128 characters, causing the events to fail when this parameter is added in the campaign attribution enrichment. This PR increases the character limit from 128 to 255.

[snowplowcla]

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[dumkydewilde]

Thanks for your pull request. Is this your first contribution to a Snowplow open source project? Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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I've signed the CLA 👍

[snowplowcla]

Confirmed! @dumkydewilde has signed the Contributor License Agreement. Thanks so much.

[miike]

Thanks @dumkydewilde - we're looking at this at the moment, it may involve bumping this even higher due to some ad networks (e.g., Tiktok) having longer than 255 characters for their ad ids.

[stanch]

I believe this is more complicated, because the atomic schema is hardcoded in a few places. Currently, you can disable the check as a workaround: https://docs.snowplow.io/docs/pipeline-components-and-applications/enrichment-components/configuration-reference/#enriched-events-validation-against-atomic-schema