fix: swap middleware order so stripPrefix runs before addPrefix

[mixelburg]

Fixes #3709

When both Strip Path and Internal Path are configured on a domain, the addPrefix middleware was being pushed onto the middlewares array before stripPrefix. Since Traefik executes middlewares in array order, this caused the prefix to be added to the full unstripped path.

Swapped the two blocks so stripPrefix runs first, matching the documented behavior.

Greptile Summary

Swapped middleware order in packages/server/src/utils/traefik/domain.ts:140-149 so stripPrefix executes before addPrefix. When both Strip Path and Internal Path are configured, Traefik processes middlewares in array order, so the strip operation must happen first to remove the external path before the internal path is added.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• Simple logic fix that corrects middleware execution order - no breaking changes, security issues, or complex logic introduced
• No files require special attention

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