* fix(provider-wizard): allow multiple custom OpenAI-compatible providers
Generic/custom providers (custom-openai-compatible, custom-anthropic-compatible)
all share the same CatalogID. wizardProviderStoredKey matched by CatalogID,
which blocked creating more than one custom provider.
Fix: in advanceProviderWizard, skip the ManageKey diversion for custom
providers and route directly to the endpoint step instead. The user can
overwrite an existing instance by re-entering the same name, or create a
new one with a different name.
Named providers (OpenAI, Anthropic, etc.) are unaffected — ManageKey is
still shown for them.
Fixes#375
* refactor(provider-wizard): deduplicate advance/discovery branch, add anthropic-compatible test
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Co-authored-by: Baran3575 <[email protected]>
