Fix multi-statement measure view batches (#39)

* Fix multi-statement measure view batches

* Handle dollar-quoted batch statements

* Expand aggregate batch statements independently

* Guard measure rewrites to create views

* Clean dropped measure views in batches

* Rewrite measure batches in statement order

* Support temporary measure view batches

* Skip dollar literals in aggregate extraction

* Clean temporary measure registrations

* Reject standalone temporary measure views

* Support DuckDB main base table names

* Snapshot measure catalog during batch rewrites

* Wrap batch select aggregate rewrites

* Handle batch semantic rewrites and drop rollback

* Track temporary measure use in batches

* Restore shadowed measures after temp drops

* Guard temporary measure batch edges

* Restore snapshots for skipped measure rewrites

* Keep temporary measure guards through batches

* Handle batch drop modifiers and semantic views

* Defer false measure drop cleanup

* Relax next parser error expectations

* Handle temp CTE reads and restore casing

* Use parser failures in rollback tests

* Handle temporary view edge cases

* Restore views after rollback test failures

* Clean replaced temporary snapshots

* Remove duplicate base table helper

* Handle qualified drops with temp measure views

* Handle qualified reads of shadowed measure views

* Skip dollar literals in AT shorthand rewrite

* Handle deferred temp measure replacement drops

* Make temp replacement regression parser-compatible

* Avoid lexical temp read false positives

* Relax parser-mode regression expectations

* Skip EXTRACT from lexical table reads

* Detect temp measure reads in derived subqueries

Author: nicosuave

include/yardstick_ffi.h

@@ -327,6 +327,12 @@ bool yardstick_has_curly_brace(const char* sql);
 bool yardstick_has_at_syntax(const char* sql);
 
 char* yardstick_expand_curly_braces(const char* sql);
+char* yardstick_extract_view_name(const char* sql);
+char* yardstick_extract_drop_view_name(const char* sql);
+void* yardstick_snapshot_measure_view(const char* view_name);
+void* yardstick_empty_measure_view_snapshot(void);
+void yardstick_restore_measure_view_snapshot(const char* view_name, void* snapshot);
+void yardstick_free_measure_view_snapshot(void* snapshot);
 struct YardstickCreateViewResult yardstick_process_create_view(const char* sql);
 struct YardstickAggregateResult yardstick_expand_aggregate(const char* sql);
 struct YardstickMeasureAggResult yardstick_get_measure_aggregation(const char* column_name);