…omponent unit tests

… tests

… extend related tests

…eConverter`, and adjust related tests

…on and refactor `DefaultTypeConverter`. Update tests to align with new normalization logic.

…Character values fell through to subsequent type checks

The first three `if` statements were not chained with `else`, causing:
- null values to call setNull() then fall through to the else block calling setObject(position, null)
- Character values to call setString() then fall through to the String/else-if chain

…() to stream close

The configurationProvider.unsetQuery() was called in a finally block that
executed immediately after returning the stream, before it was consumed.
Now unsetQuery() runs in the stream's onClose handler alongside the
ResultSet cleanup.

…lderFactory API

…ride methods

The wrapContext method was an identity function, making the prepareQueryable
and prepareSql overrides unnecessary pass-throughs to super.

- Test invalid enum name conversion throws IllegalArgumentException
- Test canConvert() always returns true for the default converter
- Test unrecognized types pass through unchanged
- Test double-close of QueryContext throws IllegalStateException

…owing

The Javadoc states it returns null on exception, but the implementation
was throwing RuntimeException — identical to MethodFieldAccessor.

…nds access

The resolveTypeVariable() loop always queried the initial typeVariable
instead of currentTypeVariable, so type variable chains were never
followed. Also added bounds array length check to prevent
ArrayIndexOutOfBoundsException.

Previously, null values from the delegate accessor were passed directly
to the converter method, causing NullPointerException. Now returns null
without invoking the converter.

Adds AccessorTest (8 tests) covering MethodFieldAccessor,
LaxMethodFieldAccessor, FieldFieldAccessor, and ConvertingFieldAccessor
including null handling and error behavior.

Adds DataFormatsTest (10 tests) covering beans convention, component
method convention, fields convention, fields-via-method convention,
nested objects, collections, maps, sub-filter exclusion, and accessor
value correctness.