the config cache is keyed by user, but a member's entry holds the owner's
base — resolved at read time, since a member's row stores no url. dropping
only the caller's entry was correct while each row was self-contained; once
rows inherit, the owner moving or disconnecting the instance left every
member cached against the previous host until the sidecar restarted.
also returns the resolved instanceUrl from connectionState. members not
being able to set it is the invariant; not seeing it never was and could
not be — every avatar_url the instance hands back is on that origin.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
pastilhasandClaude Opus 5
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