Fix (Gateway Manager) CP will fail and refuse to send payload

[TuannasCodeCatastrophe]

Description

Definition of done

Update https://developer.konghq.com/gateway-manager/version-compatibility/ to contain information on cases where the CP will fail to communicate with the DP.

The cases are:

expression Routes used with a DP not supporting expression router flavour
some specific incompatibility for the ai-advanced-rate-limiting plugin (API breaking change pre and post 3.10)
For a few other cases the CP will send the payload knowing that it will fail the DP validation purposely to avoid security breaches (look for "out of sync" in the docs I linked above):
when certificates are expired
when some other incompatibilities cannot be resolved (including unsupported custom plugins)
Information
https://kongstrong.slack.com/archives/C04RXLGNB6K/p1759944513796129

Due date (optional)
Size

Fixes #3155

Preview Links

https://deploy-preview-3536--kongdeveloper.netlify.app/gateway/data-plane-version-compatibility/

Checklist

• Tested how-to docs. If not, note why here.
• All pages contain metadata.
• Any new docs link to existing docs.
• All autogenerated instructions render correctly (API, decK, Konnect, Kong Manager).
• Style guide (capitalized gateway entities, placeholder URLs) implemented correctly.
• Every page has a description entry in frontmatter.
• Add new pages to the product documentation index (if applicable).

[netlify]

✅ Deploy Preview for kongdeveloper ready!

Name	Link
🔨 Latest commit	f61e574
🔍 Latest deploy log	https://app.netlify.com/projects/kongdeveloper/deploys/6931acd196d9820008e30203
😎 Deploy Preview	https://deploy-preview-3536--kongdeveloper.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ fabianrbz
❌ TuannasCodeCatastrophe

---

TuannasCodeCatastrophe seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[TuannasCodeCatastrophe]

Learning sync arranged 25 Nov 10am to confirm method of generating error codes.

[TuannasCodeCatastrophe]

@fabianrbz all these errors have appeared after us working on this; any idea what's wrong?

[TuannasCodeCatastrophe]

Documentation URL may need to be added in

fabianrbz all these errors have appeared after us working on this; any idea what's wrong?

After sync:

• Documentation URL may need to be added in. @fabianrbz to check if required. Weird YAML issues.

[fabianrbz]

@TuannasCodeCatastrophe I've rebased the branch because it was too old, it didn't even have the page you were trying to update.
Make sure you do a git pull

[fabianrbz]

I left a couple of comments

[TuannasCodeCatastrophe]

test

[TuannasCodeCatastrophe]

Test x 2