Fix SCIM bridge PUT loop and pagination

Two bugs caused SCIM sync failures:

1. buildUserPayload conditionally omitted empty fields. When a field was
   cleared in the identity provider, the PUT payload didn't include it,
   so the SCIM handler never cleared the stored value. The bridge kept
   detecting a mismatch every sync cycle, causing a perpetual PUT loop.
   Fix: always include all fields unconditionally.

2. ListUsers ignored the startIndex parameter — the cursor always started
   from nil, so every page returned the same first N users. Organizations
   with more than 100 SCIM-managed users never got a full listing; users
   beyond the first page appeared missing, causing CreateUser calls that
   failed with 409 (uniqueness conflict) and eventually disabled the
   bridge. Fix: replace cursor-based pagination with OFFSET/LIMIT to
   honor SCIM's 1-based startIndex.

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/coredata/membership_profile.go

@@ -447,6 +447,118 @@ WHERE
 	return nil
 }
 
+func (p *MembershipProfiles) LoadAllByOrganizationID(
+	ctx context.Context,
+	conn pg.Querier,
+	scope Scoper,
+	organizationID gid.GID,
+	filter *MembershipProfileFilter,
+) error {
+	q := `
+WITH profiles AS (
+    SELECT
+        p.id,
+        p.identity_id,
+        p.organization_id,
+        i.email_address,
+        p.source,
+        p.state,
+        p.full_name,
+        p.kind,
+        p.additional_email_addresses,
+        p.position,
+        p.contract_start_date,
+        p.contract_end_date,
+        p.user_name,
+        p.external_id,
+        p.nickname,
+        p.locale,
+        p.timezone,
+        p.profile_url,
+        p.preferred_language,
+        p.given_name,
+        p.family_name,
+        p.formatted_name,
+        p.middle_name,
+        p.honorific_prefix,
+        p.honorific_suffix,
+        p.employee_number,
+        p.department,
+        p.cost_center,
+        p.enterprise_organization,
+        p.division,
+        p.manager_value,
+        p.created_at,
+        p.updated_at
+    FROM
+        iam_membership_profiles p
+    INNER JOIN identities i ON i.id = p.identity_id
+    WHERE
+        p.%s
+        AND p.organization_id = @organization_id
+        AND %s
+)
+SELECT
+    id,
+    identity_id,
+    organization_id,
+    email_address,
+    source,
+    state,
+    full_name,
+    kind,
+    additional_email_addresses,
+    position,
+    contract_start_date,
+    contract_end_date,
+    '' AS organization_name,
+    user_name,
+    external_id,
+    nickname,
+    locale,
+    timezone,
+    profile_url,
+    preferred_language,
+    given_name,
+    family_name,
+    formatted_name,
+    middle_name,
+    honorific_prefix,
+    honorific_suffix,
+    employee_number,
+    department,
+    cost_center,
+    enterprise_organization,
+    division,
+    manager_value,
+    created_at,
+    updated_at
+FROM profiles
+`
+
+	q = fmt.Sprintf(q, scope.SQLFragment(), filter.SQLFragment())
+
+	args := pgx.NamedArgs{
+		"organization_id": organizationID,
+	}
+	maps.Copy(args, scope.SQLArguments())
+	maps.Copy(args, filter.SQLArguments())
+
+	rows, err := conn.Query(ctx, q, args)
+	if err != nil {
+		return fmt.Errorf("cannot query profiles: %w", err)
+	}
+
+	profiles, err := pgx.CollectRows(rows, pgx.RowToAddrOfStructByName[MembershipProfile])
+	if err != nil {
+		return fmt.Errorf("cannot collect profiles: %w", err)
+	}
+
+	*p = profiles
+
+	return nil
+}
+
 func (p *MembershipProfiles) LoadByIdentityID(
 	ctx context.Context,
 	conn pg.Querier,