Handle unary negation in tuple literal detection for IN lists

Use containsOnlyPrimitiveLiteralsWithUnary instead of
containsOnlyPrimitiveLiterals when checking if tuple literals in IN
expressions can be combined into a single Literal output.

This fixes tuples like (1, -1), (3, -3) being incorrectly output as
Function tuple instead of Literal Tuple_(UInt64_1, Int64_-1).

Fixes 9 additional tests.

Author: claude

internal/explain/functions.go

@@ -983,8 +983,8 @@ func explainInExpr(sb *strings.Builder, n *ast.InExpr, indent string, depth int)
 				if lit.Type != ast.LiteralTuple {
 					allTuples = false
 				} else {
-					// Check if this tuple contains only primitive literals
-					if !containsOnlyPrimitiveLiterals(lit) {
+					// Check if this tuple contains only primitive literals (including unary negation)
+					if !containsOnlyPrimitiveLiteralsWithUnary(lit) {
 						allTuplesArePrimitive = false
 					}
 				}
@@ -1090,8 +1090,8 @@ func explainInExpr(sb *strings.Builder, n *ast.InExpr, indent string, depth int)
 
 // explainTupleInInList renders a tuple in an IN list - either as Literal or Function tuple
 func explainTupleInInList(sb *strings.Builder, lit *ast.Literal, indent string, depth int) {
-	if containsOnlyPrimitiveLiterals(lit) {
-		// All primitives - render as Literal Tuple_
+	if containsOnlyPrimitiveLiteralsWithUnary(lit) {
+		// All primitives (including unary negation) - render as Literal Tuple_
 		fmt.Fprintf(sb, "%s Literal %s\n", indent, FormatLiteral(lit))
 	} else {
 		// Contains expressions - render as Function tuple

parser/testdata/00317_in_tuples_and_out_of_range_values/metadata.json

@@ -1,7 +1 @@
-{
-  "explain_todo": {
-    "stmt5": true,
-    "stmt6": true,
-    "stmt7": true
-  }
-}
+{}

parser/testdata/00441_nulls_in/metadata.json

@@ -1,9 +1 @@
-{
-  "explain_todo": {
-    "stmt13": true,
-    "stmt14": true,
-    "stmt15": true,
-    "stmt16": true,
-    "stmt17": true
-  }
-}
+{}

parser/testdata/01071_in_array/metadata.json

@@ -1,5 +1 @@
-{
-  "explain_todo": {
-    "stmt7": true
-  }
-}
+{}