Support multiple secret columns in SQL directories

crates/directory/src/backend/sql/config.rs

@@ -32,9 +32,9 @@ impl SqlDirectory {
                 .unwrap_or_default()
                 .to_string(),
             column_secret: config
-                .value((&prefix, "columns.secret"))
-                .unwrap_or_default()
-                .to_string(),
+                .values((&prefix, "columns.secret"))
+                .map(|(_, v)| v.to_string())
+                .collect(),
             column_quota: config
                 .value((&prefix, "columns.quota"))
                 .unwrap_or_default()

crates/directory/src/backend/sql/lookup.rs

@@ -209,7 +209,11 @@ impl SqlMappings {
 
         if let Some(row) = rows.rows.into_iter().next() {
             for (name, value) in rows.names.into_iter().zip(row.values) {
-                if name.eq_ignore_ascii_case(&self.column_secret) {
+                if self
+                    .column_secret
+                    .iter()
+                    .any(|c| name.eq_ignore_ascii_case(c))
+                {
                     if let Value::Text(secret) = value {
                         principal.secrets.push(secret.into_owned());
                     }

crates/directory/src/backend/sql/mod.rs

@@ -25,7 +25,7 @@ pub(crate) struct SqlMappings {
     query_verify: String,
     query_expand: String,
     column_description: String,
-    column_secret: String,
+    column_secret: Vec<String>,
     column_quota: String,
     column_type: String,
 }