Call processIndirect for CTE references to get proper column context

The root cause of the "no such column: name" error was that CTEs were
not calling processIndirect(), unlike subqueries. This meant the CTE's
selCtx was never set, and column lookups would fail.

processIndirect runs the CTE's inner SELECT through the primitive
generation pipeline, which sets up the proper column metadata with
both API names and user aliases - enabling column name resolution.

Author: claude

internal/stackql/astanalysis/earlyanalysis/ast_expand.go

@@ -842,14 +842,17 @@ func (v *indirectExpandAstVisitor) Visit(node sqlparser.SQLNode) error {
 		// Check if this is a CTE reference.
 		cteName := node.Name.GetRawVal()
 		if cte, isCTE := v.cteRegistry[cteName]; isCTE {
-			// This is a CTE reference - create and register an indirect.
-			// The CTE's inner SELECT has already been visited when processing
-			// the WITH clause, so the API tables within it will be processed.
+			// This is a CTE reference - create and process an indirect.
+			// We need to call processIndirect to get the proper column context
+			// from the CTE's SELECT statement.
 			indirect, err := astindirect.NewCTEIndirect(cte)
 			if err != nil {
 				return err
 			}
-			v.annotatedAST.SetIndirect(node, indirect)
+			err = v.processIndirect(node, indirect)
+			if err != nil {
+				return err
+			}
 			return nil
 		}
 		containsBackendMaterial := v.handlerCtx.GetDBMSInternalRouter().ExprIsRoutable(node)