fix: handle text refs in strict echo handler

[mtandersson]

Fixes a problem where the server generated code did not compile for strict echo.

Also adds a test case to trigger the problem and then verify the update

fixes #2076

[kusari-inspector[bot]]

Kusari Analysis Results:

✅ No Flagged Issues Detected All values appear to be within acceptable risk parameters.

No pinned version dependency changes, code issues or exposed secrets detected!

@kusari-inspector rerun - Trigger a re-analysis of this PR @kusari-inspector feedback [your message] - Send feedback to our AI and team See Kusari's documentation for setup and configuration. Commit: 64bf531aa443aa326f6857b48c180ece59294a00, performed at: 2025-09-04T11:36:07Z

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