Function config_params truncates values containing equals signs

[hsusul]

Bug

FUNCTIONS_SQL parses proconfig with:

(string_to_array(unnest(proconfig), '='))[1] as param,
(string_to_array(unnest(proconfig), '='))[2] as value

Any config value that itself contains = (e.g. SET application_name TO 'api=worker') is truncated at the first extra =. Observed: application_name → api instead of api=worker.

This is the same class of bug as role config truncation (#1117), but in the functions catalog path — Studio list/retrieve/update-recreate of functions can corrupt GUC values that contain =.

Reproduce

create function public.config_eq_test() returns void
language sql set application_name to 'api=worker'
as $$ select 1; $$;

Then inspect config_params from GET /functions / functions.retrieve.

Expected

config_params.application_name === 'api=worker'

Suggested fix

Split on the first = only, e.g. split_part(cfg, '=', 1) + substring(cfg from position('=' in cfg) + 1) via lateral unnest(proconfig).