OpenSystemsDevelopment / qpdf

Refactor Stream factories

…arameters with their existing empty values.

…e parameters with their existing values.

Refactor QPDFFormFieldObjectHelper and QPDFEFStreamObjectHelper

…ng handling with `qpdf::String`, and clean up `Members` class implementation.

…ant logic, and streamline type conversions.

…::types` helpers, simplify pipeline usage, and clean up includes.

Refactor QPDFParser

… clean up unused file.

…and simplify pipeline logic.

…nt checks, and streamline string handling.

…` file and eliminate unneccessary creation of `Members` object.

…sting return values for uninitialized objects, and cleaning up error handling logic.

…ndles on invalid input..

…eplacing redundant logic with centralized functions, and streamlining bad token handling for improved readability and maintainability.

…raints, replacing hardcoded values for nesting, container size, and error limits.

Minor refactorings

… for improved code readability and maintainability.

… simplify logic. Update related test outputs and release notes.

Add new private-API class String

…` and replace with `String::utf16`.

Added `qpdf::String` class to encapsulate string operations. Updated `QPDFObjectHandle` string methods to utilize `qpdf::String`, streamlined empty string handling, and removed redundant test coverage entries.

…oved shared pointer handling, remove deprecated object methods, and update all references.

Refactor `qpdf-c` object handle management: replace `shared_ptr` with…

…DFObjectHandle` storage, remove unused trace calls, and streamline invalid handle checks.

Remove implementation detail from QPDF header file

…sages, and clean up `QPDF.hh`.

… and `findEndstream` to `Objects`, remove `QPDF::PatternFinder` class, and update related logic for improved encapsulation.

…, replace direct calls with `QIntC` equivalents, and clean up `QPDF.hh`.

Refactor `QPDFAcroFormDocumentHelper::traverseField`: add validation …

…t` consistency to handle invalid entries, and improve loop detection logic.

Refactor `QPDFAcroFormDocumentHelper`: simplify `traverseField`, remo…

…` parameter, update conditional checks, and streamline logic for field and annotation handling.

Tighten validation of the PDF spec requirements that form fields form a tree and that widget annotations have a single parent by utilizing `field_to` and `annotation_to_field` in the loop detection check.

Deprecate QPDF::compute_encryption_key