Fixes:

1. https://github.com/duckdblabs/duckdb-internal/issues/3041 - Recurse into materialized CTE definitions in FilterPushdown.
2. Binder error when manually materializing a CTE #13850 - Disable auto-CTE materialization when one or more of the CTEs in the query are manually materialized.
3. Json property name with special characters produce inconsistent results with json -> 'propertyname' and json_extract #13948 - Use JSONPath instead of JSONPointer to resolve JSON extracts that do no explicitly begin with a $ or /, and also implement a special case for when the extract argument is integral (array extract). This more closely matches PostgreSQL behavior.
4. INTERNAL Error: Attempted to dereference unique_ptr that is NULL #13938 - Reset chunk in PhysicalPieceWiseMergeJoin if it has a cardinality of 0 (it may have been sliced before, changing the vectors to Dictionary, which messes up a Reference when filling Left/Outer join NULLs).

I've also tweaked the CardinalityEstimator to fix a regression to TPC-H Q9 introduced when going from 1.0.0 to 1.1.0.

EDIT: I've also tweaked some allocation settings so that we are less likely to OOM when running large queries on small hardware.