Column for primary key not found in schema if constraint column in uppercase

[osipovartem]

Describe the bug

Query

create table test (COLUMN_NAME TEXT NOT NULL,  constraint COLUMN_NAME_PK primary key (COLUMN_NAME))

triggers the error
Column for primary key not found in schema: COLUMN_NAME

When creating a table, we build a schema and apply normalization to column names with to_ascii_lowercase call, which is enabled by default.
But during constraint check we don't do this for the constraint column name.

To Reproduce

No response

Expected behavior

The query should work without errors

create table test (COLUMN_NAME TEXT NOT NULL,  constraint COLUMN_NAME_PK primary key (COLUMN_NAME))

Additional context

Suggestion to use just to_lowercase (since we don't pass column names with ascii symbols)

.position(|item| *item.to_lowercase() == pk.value.to_lowercase())