Split inactive profile state

Replace the binary profile ACTIVE/INACTIVE model with PENDING, ACTIVE,
and DEACTIVATED so invited-but-not-yet-activated members remain
assignable to assets, data, and risks instead of being treated like
deactivated users.

Add activated_at/deactivated_at timestamps and Mark* lifecycle helpers,
and update every transition (create, invite/re-invite, activation,
archive, SCIM, SAML, sessions, compliance-portal grant) to the new
states. Expose a multi-state states[] filter across coredata, GraphQL,
MCP, and the console owner pickers, which now request ACTIVE and
PENDING members.

A migration renames the membership_state enum, classifies existing
inactive profiles as PENDING from recent invitation activity, and
backfills the new timestamp columns.

Signed-off-by: Émile Ré <emile@probo.com>

pkg/complianceportal/visitor/service.go

@@ -394,6 +394,7 @@ func (s *Service) ProvisionPortalMember(
 					EmailAddress:   identity.EmailAddress,
 					Source:         coredata.ProfileSourceManual,
 					State:          coredata.ProfileStateActive,
+					ActivatedAt:    &now,
 					FullName:       identity.FullName,
 					CreatedAt:      now,
 					UpdatedAt:      now,