aliases are normalized and used in normalized state, but nonnormalized aliases contain everything

common/src/proto/komp_ac.table_definition.rs

@@ -90,7 +90,12 @@ pub struct GeneratedColumnAlias {
     /// ignored, so a typo cannot pass silently.
     #[prost(string, tag = "1")]
     pub generated_name: ::prost::alloc::string::String,
-    /// What the column should be called instead. Same rules as any column name.
+    /// What the column should be called instead. Preserved exactly for display.
+    /// Aliases may contain Unicode letters, numbers, spaces, punctuation and
+    /// symbols, but not leading/trailing whitespace or control characters, and
+    /// are limited to 63 UTF-8 bytes. Uniqueness and lookup use a compatibility-
+    /// normalized, Unicode-case-folded key that collapses whitespace and ignores
+    /// emoji while keeping punctuation significant.
     #[prost(string, tag = "2")]
     pub alias: ::prost::alloc::string::String,
 }