feat: make the metadata of an endpoint be more flexible #126
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Fixes EMQX-13225
In previous versions, the metadata was statically derived from the
authorize
method, but some endpoints (login, external callback of SSO) may not have anauthorize
method, or it may be an interactive endpoint whose metadata cannot be determined in one step.Here, the metadata is moved from the function return to the process dictionary, so that the metadata in the endpoint can be updated.