fix(tesseract): Fix member name case conversion

Prepend "_" even to the first UPPERCASE letter in the name

Author: KSDaemon

rust/cubesqlplanner/cubesqlplanner/src/planner/sql_templates/plan.rs

@@ -146,8 +146,17 @@ impl PlanSqlTemplates {
                 Boundary::DIGIT_UPPER,
                 Boundary::ACRONYM,
             ])
-            .to_case(Case::Snake)
-            .replace(".", "__");
+            .to_case(Case::Snake);
+
+        // For strange reasons, the javascript snake caser used in cube
+        // changes first UPPERCASE letter to "_lowercase", prepending "_"
+        // This is weird, but to be compatible we have to add it too.
+        if let Some(fl) = name.chars().next() {
+            if fl.is_uppercase() {
+                return format!("_{}", res);
+            }
+        }
+
         res
     }