PS: A couple of small dbscheme changes.

1. Flip the name of the child and parent column for 'parent' to reflect
how this is actually populated by the extractor.
2. Make some of the coumns more specific to the actual data type.
3. Make `@named_attribute_argument` an `@ast` branch.

Author: MathiasVP

powershell/ql/lib/semmlecode.powershell.dbscheme

@@ -64,15 +64,15 @@ extractor_messages(
 );
 
 parent(
-  int parent: @ast ref,
-  int child: @ast ref
+  int child: @ast ref,
+  int parent: @ast ref
 );
 
 /* AST Nodes */
 // This is all the kinds of nodes that can inherit from Ast
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.ast?view=powershellsdk-7.3.0
 @ast = @not_implemented | @attribute_base | @catch_clause | @command_element |
-@member | @named_block | @param_block | @parameter | @redirection | @script_block | @statement | @statement_block;
+@member | @named_block | @param_block | @parameter | @redirection | @script_block | @statement | @statement_block | @named_attribute_argument;
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.attributebaseast?view=powershellsdk-7.2.0
 @attribute_base = @attribute | @type_constraint;
 
@@ -409,13 +409,13 @@ if_statement(
 if_statement_clause(
   int id: @if_statement ref,
   int index: int ref,
-  int item1: @ast ref,
-  int item2: @ast ref
+  int item1: @pipeline_base ref,
+  int item2: @statement_block ref
 )
 
 if_statement_else(
   int id: @if_statement ref,
-  int elseItem: @ast ref 
+  int elseItem: @statement_block ref 
 )
 
 if_statement_location(
@@ -467,7 +467,7 @@ statement_block_trap(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.subexpressionast?view=powershellsdk-7.3.0
 sub_expression(
   unique int id: @sub_expression,
-  int subExpression: @ast ref
+  int subExpression: @statement_block ref
 )
 
 sub_expression_location(
@@ -627,7 +627,7 @@ exit_statement(
 
 exit_statement_pipeline(
   int id: @exit_statement ref,
-  int expression: @ast ref
+  int expression: @pipeline_base ref
 )
 
 exit_statement_location(
@@ -814,7 +814,7 @@ continue_statement_location(
 
 statement_label(
   int id: @labelled_statement ref,
-  int label: @ast ref
+  int label: @expression ref
 )
 
 // ReturnStatementAst
@@ -825,7 +825,7 @@ return_statement(
 
 return_statement_pipeline(
   int id: @return_statement ref,
-  int pipeline: @ast ref
+  int pipeline: @pipeline_base ref
 )
 
 return_statement_location(
@@ -837,12 +837,12 @@ return_statement_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.dowhilestatementast?view=powershellsdk-7.3.0
 do_while_statement(
   unique int id: @do_while_statement,
-  int body: @ast ref
+  int body: @statement_block ref
 )
 
 do_while_statement_condition(
   int id: @do_while_statement ref,
-  int condition: @ast ref
+  int condition: @pipeline_base ref
 )
 
 do_while_statement_location(
@@ -854,12 +854,12 @@ do_while_statement_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.dountilstatementast?view=powershellsdk-7.3.0
 do_until_statement(
   unique int id: @do_until_statement,
-  int body: @ast ref
+  int body: @statement_block ref
 )
 
 do_until_statement_condition(
   int id: @do_until_statement ref,
-  int condition: @ast ref
+  int condition: @pipeline_base ref
 )
 
 do_until_statement_location(
@@ -871,12 +871,12 @@ do_until_statement_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.whilestatementast?view=powershellsdk-7.3.0
 while_statement(
   unique int id: @while_statement,
-  int body: @ast ref
+  int body: @statement_block ref
 )
 
 while_statement_condition(
   int id: @while_statement ref,
-  int condition: @ast ref
+  int condition: @pipeline_base ref
 )
 
 while_statement_location(
@@ -888,9 +888,9 @@ while_statement_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.foreachstatementast?view=powershellsdk-7.3.0
 foreach_statement(
   unique int id: @foreach_statement,
-  int variable: @ast ref,
-  int condition: @ast ref,
-  int body: @ast ref,
+  int variable: @variable_expression ref,
+  int condition: @pipeline_base ref,
+  int body: @statement_block ref,
   int flags: int ref
 )
 
@@ -903,7 +903,7 @@ foreach_statement_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.forstatementast?view=powershellsdk-7.3.0
 for_statement(
   unique int id: @for_statement,
-  int body: @ast ref
+  int body: @statement_block ref
 )
 
 for_statement_location(
@@ -913,17 +913,17 @@ for_statement_location(
 
 for_statement_condition(
   int id: @for_statement ref,
-  int condition: @ast ref
+  int condition: @pipeline_base ref
 )
 
 for_statement_initializer(
   int id: @for_statement ref,
-  int initializer: @ast ref
+  int initializer: @pipeline_base ref
 )
 
 for_statement_iterator(
   int id: @for_statement ref,
-  int iterator: @ast ref
+  int iterator: @pipeline_base ref
 )
 
 // ExpandableStringExpressionAst
@@ -988,14 +988,14 @@ unary_expression_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.catchclauseast?view=powershellsdk-7.3.0
 catch_clause(
   unique int id: @catch_clause,
-  int body: @ast ref,
+  int body: @statement_block ref,
   boolean isCatchAll: boolean ref
 )
 
 catch_clause_catch_type(
   int id: @catch_clause ref,
   int index: int ref,
-  int catch_type: @ast ref
+  int catch_type: @type_constraint ref
 )
 
 catch_clause_location(
@@ -1024,7 +1024,7 @@ throw_statement_pipeline(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.trystatementast?view=powershellsdk-7.3.0
 try_statement(
   unique int id: @try_statement,
-  int body: @ast ref
+  int body: @statement_block ref
 )
 
 try_statement_catch_clause(
@@ -1099,9 +1099,9 @@ token_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.configurationdefinitionast?view=powershellsdk-7.3.0
 configuration_definition(
   unique int id: @configuration_definition,
-  int body: @ast ref,
+  int body: @script_block_expression ref,
   int configurationType: int ref,
-  int name: @ast ref
+  int name: @expression ref
 )
 
 configuration_definition_location(
@@ -1113,7 +1113,7 @@ configuration_definition_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.datastatementast?view=powershellsdk-7.3.0
 data_statement(
   unique int id: @data_statement,
-  int body: @ast ref
+  int body: @statement_block ref
 )
 
 data_statement_variable(